已知镁跟稀硝酸反应时，每有1molHNO3反应，就有0.8mol电子转移，此时H

Woman: Professor Smith, I really need the credits to graduate this summer.Man: Here in this school: the credits are earned, not given.Question: What do we learn from the conversation

A．The woman has to attend a summer course to graduate.

B．The man thinks the woman can earn the credits.

C．The woman is begging the man to let her pass the exam.

D．The woman is going to graduate from summer school.

某校九年级一班体育兴趣小组四位同学的身高（单位：cm）分别为：170，170，166，174，则这四位同学的平均身高为（    ）cm。

甲乙两小车小同时同地同方向做匀速直线运动，它们的s一t图象如图所示．两小车的速度大小关系是V_甲______V_乙（填“＞”、“＜”或“=”）

什么叫过热器热偏差？由哪些方面原因引起？

该病例中医辨证当为( )

A．肝火化风

B．心火扰动

C．痰火内盛

D．气逆痰阻

E．湿热阻滞