题目内容
下列属于天然高分子材料的囊材是
2021-10-14
A.明胶
B.乙基纤维素
C.阿拉伯胶
D.聚维酮
E.聚乳酸
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='25709' and id < 2161245 and id<>'2161245' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25709' and id > 2161245 and id<>'2161245' order by id asc limit 5