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【单选题】
下图是11种昆虫A～K的栖息环境特性(Y轴)与其取食植物(X轴)的关系图，图中Y轴中点连线(虚线)表示对栖息环境无所偏好。根据图中的关系，下列选项中错误的是 [ ]A.
取食山柑科的昆虫主要生活在潮湿环境，偏好阳光充足环境的昆虫有两种
B.
仅两种昆虫可能同时以和十字花科植物为食
C.
昆虫G较H对栖息的环境要求高，昆虫H较昆虫G食物种类多，有食物的季节也较长
D.
取食十字花科植物叶片的昆虫种类比取食十字花科植物花序的少
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【多选题】PCR样品制备时应注意( )
A.
应有专门的区域制备模板
B.
提取DNA样品和RNA样品时要带手套且经常更换
C.
纯化样品对污染有极大的影响
D.
普通分子克隆工具不能用做样品的处理和靶序列
E.
提取核酸所用的试剂要求新鲜配制或者适当储存未经使用的试剂.
【简答题】Do you wish to enter a summer school of English in Britain? Here are some tips(指导). Most summer school courses in Britain last for two to four weeks. During that time, students live either with a Brit...
【单选题】听力原文：W: You wouldn't be interested in working this summer to make some extra money, would you? M: Not much I wouldn't. What does the man mean?
A.
He is interested in working this summer.
B.
He will work part-time this summer.
C.
He' 11 work even though he doesn' t want to.
D.
He doesn't need much money.
【单选题】听力原文：W：You wouldn't be interested in working this summer to make some extra money，would you? M：Not much，1 wouldn't．And this summer I have a vacation plan． Q：What does the man mean? (19)
A.
He is not very interested in working.
B.
He'll work even though he doesn't want to.
C.
He doesn't need much money.
D.
He could only work part of the summer.
【简答题】指出下列命题中,哪些是简单命题,哪些是复合命题。 (1) 李明是一个百米跑冠军和跳远冠军。 (2) 派黄金或赵顺去美国留学。 (3) 格林和比尔都是大学生。 (4) 格林和比尔是同学。
【单选题】— Where ______ go this summer ? — I'd like to go ______ warm. [ ]
A.
would you like to; some where
B.
will you like to; anywhere
C.
would you like to; somewhere
D.
will you like to; somewhere
【多选题】在中国特色社会主义新时代,保障和改善民生主要表现在( )。
A.
优先发展教育事业
B.
提高就业质量和人民收入水平
C.
加强社会保障体系建设
D.
坚决打赢脱贫攻坚战
E.
实施健康中国战略
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