下列叙述不正确的是（） A.妊娠加重肝负担 B.妊娠易发生急性肝

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问题单项选择题

下列叙述不正确的是（）

A.妊娠加重肝负担

B.妊娠易发生急性肝坏死

C.妊娠易感染病毒性肝炎

D.妊娠易使原有的肝炎加重

E.重症肝炎的发生率较非孕时明显增加

答案

参考答案：B

翻译题

根据汉语提示，用短语的正确形式填空，每空一词。

1. Maria taught the children to sing lively songs and perform short funny plays

to _________ them _________ (使……高兴起来).

2. I'm looking forward to _________ _________ (收到……的来信) you.

3. He is always _________ _________ (对……满意) everything in life.

4. I am a new student, but I can _________ (相处) well with all my classmates. They all like me.

5. The students are _________ their _________ (尽力) to make the plan perfect.

问答题简答题

电导有效质量和状态密度有效质量有何区别？它们与电子的纵向有效质量和横向有效质量的关系如何？