搜题请搜索小程序“爱下问搜题”
问题 填空题

地球上最先从水中登陆的动物类群是节肢动物______．

答案

生物进化的历程是结构由简单到复杂，由水生到陆生，由低等到高等．因为节肢动物有细胞分层，是简单动物进化到复杂生物的中间过渡点．

故答案为：√．

句型转换

改写句子，根据各小题Ａ句的意思完成Ｂ句，使两句的意思基本相同。每空限填一个单词。（共１２分）

小题1:A: His friend didn't know what he should do.

B: His friend didn't know                     do.

小题2:A: What was wrong with the old man？

B: What                       the old man？

小题3:A: He found it was not easy to sleep.

B: He found                       to sleep.

小题4:A: He went to bed at twelve last night.

B: He          go to bed          twelve last night

小题5:A: She was worried and her friend was worried, too.

B: She was worried and                    her friend.

小题6:A: She always makes me happier when I’m unhappy.

B: She always          me         when I’m unhappy.
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单项选择题

下列哪种心理不属于不良心理（）

A、自信心理

B、自傲心理

C、自卑心理

D、害羞心理
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