根据句意和汉语提示，填写恰当的短语完成下列句子。

1. I hope you can come back___________ (尽快地).

2. All the teachers ____________(乐意帮助) students to solve their problems.

3. We should ___________(坚持) our dreams and try to achieve them.

4. ____________(数以千计的) students were surveyed about their favorite foods.

5. My sister _____________(梦想) becoming a singer. She likes singing very much.

对于缺氧对机体的影响，下列不正确的是（）

A.心肌对缺氧十分敏感，早期可表现为心率加快，心排血量增加

B.缺氧可抑制细胞能量代谢，引起酸中毒

C.缺氧可引起黄疸和消化道出血

D.缺氧时能量不足引起钠泵失灵，导致细胞内水肿

E.缺氧时皮肤、胃肠血管收缩，而脑、肾、冠状动脉血管扩张以保证重要脏器氧供应