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1解三角形的题（要有过程!）已知锐角三角形ABC中,角A B C的对边分别为a b c且tanB=根号
解三角形的题（要有过程!）已知锐角三角形ABC中,角A B C的对边分别为a b c且tanB=根号3倍ac比上a^2+c^2-b^21)求角B2）求函数f（x)=sinx+2sinBcosx在x属于0到二分之派（闭区间）上的最大值
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2Priority should be given to peoples livelihood and their tangible benefits. The underlined
Priority should be given to peoples livelihood and their tangible benefits. The underlined part means______.
A．precedence
B．suggestions
C．attempts
D．costs
请帮忙给出正确答案和分析，谢谢！
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3△ABC中,ABC所对的边分别为a,b,c,已知a=3,cosA=√6/3,B=A+π/2,①求b的
△ABC中,ABC所对的边分别为a,b,c,已知a=3,cosA=√6/3,B=A+π/2,①求b的值②求△ABC的面积△ABC中,B=2A,a=1,b=√3,求c边△ABC的内角A,B,C的对边分别为a,b,c,已知b=2,B=π/6,c=π/4,求△ABC的面积
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4以下说法正确的是A、HBV不同亚型之间没有交叉免疫，免疫后各亚型之间不能交叉保护B、我国乙肝发病率
以下说法正确的是
A、HBV不同亚型之间没有交叉免疫，免疫后各亚型之间不能交叉保护
B、我国乙肝发病率在30～39岁有一高峰，因此，我国HBV感染者以成年为主
C、乙肝发病率有周期性起伏现象和明显的季节高峰
D、乙肝患者、HBsAg和HBeAg携带者均呈明显的家庭聚集性现象
E、乙肝主要通过粪-口途径传播
请帮忙给出正确答案和分析，谢谢！
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5某船在海上航行中不幸遇险,并发出求救信号,我海上救生艇在A处获悉后,立即测出该船的方位角为45度,与
某船在海上航行中不幸遇险,并发出求救信号,我海上救生艇在A处获悉后,立即测出该船的方位角为45度,与之相距10nmail的C处,还测得该船正沿方位角105度的方向以每小时9nmail的速度向一个小岛靠近,我海上救生艇立即以每小时21nmail的速度前往营救,求出海上救生艇的航向及与呼救船相遇所需要的时间
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6The function of the sentence "A nice day, isnt it？" is______.A．informativeB．phaticC．direct
The function of the sentence "A nice day, isnt it？" is______.
A．informative
B．phatic
C．directive
D．performative
请帮忙给出正确答案和分析，谢谢！
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7机体对HBV有免疫力的指标是A.AB.BC.CD.DE.E
机体对HBV有免疫力的指标是
A.A
B.B
C.C
D.D
E.E
请帮忙给出正确答案和分析，谢谢！
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8代人提问!高中数学必修五的解三角形问题会的来,在三角形ABC中,角B=30度,AB=2倍更号3,面积
代人提问!高中数学必修五的解三角形问题会的来,在三角形ABC中,角B=30度,AB=2倍更号3,面积S=更号3求AC?已知三角形ABC中面积S=6倍更号3,周长L=18,C=拜托各位了在晚上前．．．请写明全过程,,......
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9:三角形ABC,b=12,C=30度,A=120度.求a,
:三角形ABC,b=12,C=30度,A=120度.求a,
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10Which of the following sentences is an emphatic sentence（强调句)？A．What he means, in other
Which of the following sentences is an emphatic sentence(强调句)？
A．What he means, in other words, his intentions is more annoying than his words.
B．His intentions instead of his words have annoyed me.
C．I was annoyed by his intentions rather than what he means.
D．It is what he means rather than what he says that annoys me.
请帮忙给出正确答案和分析，谢谢！
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