11右边表格表示某草原生态系的食物网情况（√表 示其左侧竖栏所示生物以上面横栏中所示生物为食），以下分析正确的是（ ） <table style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-COLLAPSE: collapse; MARGIN-LEFT: 6.75pt; BORDER-TOP: medium none; MARGIN-RIGHT: 6.75pt; BORDER-RIGHT: medium none" border="1" cellspacing="0" cellpadding="0" align="right" _dj="MsoNormalTable"><tbody><tr style="HEIGHT: 19.15pt"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.75pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: 1pt solid; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">草</td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: 1pt solid; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">a</td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: 1pt solid; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">b</td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: 1pt solid; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">c</td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: 1pt solid; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">d</td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: 1pt solid; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">e</td></tr><tr style="HEIGHT: 19.15pt"><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: 1pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.75pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">a</td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">√</td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td></tr><tr style="HEIGHT: 19.15pt"><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: 1pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.75pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">b</td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">√</td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td></tr><tr style="HEIGHT: 19.15pt"><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: 1pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.75pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">c</td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">√</td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td></tr><tr style="HEIGHT: 19.15pt"><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: 1pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.75pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">d</td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">√</td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td></tr><tr style="HEIGHT: 19.15pt"><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: 1pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.75pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">e</td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">√</td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">√</td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: medium none; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td></tr></tbody></table>
A.此食物网有4条食物链
B.如果人类大量捕杀c会使d的数量减少
C.次级消费者有b、d、e
D.如果能量传递效率都按10%计算，并且草传递给b和c的能量相等，那么a的能量与d的能量相等
开始考试练习点击查看答案122008年9月，有北美“吸血鬼”之称的悬铃木方翅网蝽惊现成都，它用针状的嘴专刺吸梧桐叶里的汁液，导致成都70%梧桐树叶片枯黄脱落，树木提前进入“冬季”。下列说法正确的是（ ）①悬铃木方翅网蝽与法国梧桐之间的关系属于寄生 ②外来物种的入侵是破坏我国生物多样性的主要原因 ③悬铃木方翅网蝽刺吸梧桐叶汁液，可以导致叶片光合作用减弱，影响生长 ④生物多样性包括三个层次：基因多样性、遗传多样性、物种多样性 ⑤悬铃木方翅网蝽的个体发育属于变态发育 ⑥由于受自身密度影响，悬铃木方翅网蝽种群最终呈“S”型曲线增长
A.①③⑤⑥
B.②③④⑤
C.③④⑤⑥
D.①②③⑤
开始考试练习点击查看答案13下列有关生态系统能量流动的叙述中，正确的是（ ）
A.一种蜣螂专以象粪为食，则该种蜣螂最多能获取大象所同化能量的20%
B.当狼捕食兔子并同化为自身的有机物时，能量就从第一营养级流入第二营养级
C.生产者通过光合作用合成有机物，能量就从非生物环境流入生物群落
D.生态系统的能量是伴随物质而循环利用的
开始考试练习点击查看答案14下列有关干旱区域的生物与环境之间关系的叙述，正确的是（ ）
A.干旱区域的生态系统食物链少，抵抗力稳定性强
B.干旱区域的生态系统自动调节能力弱，恢复力稳定性强
C.经干旱环境长期诱导，生物体往往发生耐旱突变
D.种群密度是限制干旱区域生物种群数量增长的关键生态因素
开始考试练习点击查看答案15组织液大量积累在组织间隙会导致组织水肿。下列各项不会引起组织水肿的是（ ）
A.营养不良，血浆蛋白含量减少
B.花粉过敏引起毛细血管通透性增加
C.肾小球肾炎导致蛋白尿
D.食物过咸导致血浆渗透压增高
开始考试练习点击查看答案16被切除某一内分泌器官的褐家鼠会很快死亡，若补充大量食盐水可维持生存，切除的这一内分泌器官最可能是（ ）
A.甲状腺
B.胰腺
C.肾上腺
D.脑垂体
开始考试练习点击查看答案17人体细胞只有通过内环境才能与外界环境进行物质交换。在正常情况下，内环境中不含有的成分是（ ）①血红蛋白 ②血浆蛋白 ③纤维素 ④尿素 ⑤递质 ⑥DNA
A.①③⑥
B.①③⑤
C.②④⑤
D.②④⑥
开始考试练习点击查看答案18狼体内有a种蛋白质，兔体内有b种蛋白质，狼捕食兔后，狼体内的一个细胞中含有的蛋白质最可能是多少种？（ ）
A.a+b
B.a
C.小于a
D.大于a
开始考试练习点击查看答案19“5、12”汶川大地震中，在废墟里被埋了80个小时的17岁“可乐男孩”薛枭获救后，一句“叔叔，我想要喝可乐，冰冻的”让人们记忆深刻。下列有关“可乐男孩”在80小时内生理上出现的适应性变化叙述正确的是（ ）
A.在下丘脑形成渴觉
B.下丘脑分泌抗利尿激素释放激素增多
C.垂体后叶释放抗利尿激素增多
D.胰岛素分泌增多
开始考试练习点击查看答案20某同学在培养皿底部铺上棉花并加入适量的清水，然后把胚具活性且大小相同的豌豆种子各15粒放在棉花上。实验过程与结果如下表，下列叙述正确的是（ ） <table border="1" cellspacing="0" cellpadding="0" _dj="MsoNormalTable"><tbody><tr><td width="67">装置</td><td width="130">场所</td><td width="130">温度</td><td width="130">棉花状态</td><td width="130">数日后的现象</td></tr><tr><td width="67">甲乙丙丁</td><td width="130">日光日光黑暗黑暗</td><td width="130">23℃23℃23℃23℃</td><td width="130">潮湿干燥潮湿干燥</td><td width="130">全部发芽没有发芽全部发芽没有发芽</td></tr></tbody></table>
A.该实验研究的目的是：探究光照、温度和水分对种子萌发的影响
B.该实验的自变量为光照、温度和水分，因变量为种子的发芽率
C.该实验选用胚具活性且大小相同的豌豆作为实验材料属于对无关变量的控制
D.该实验的结论是：种子萌发只与光照和水分有关
开始考试练习点击查看答案