什么是压强？什么是表压、真空度和绝对压力？

根据首字母提示补全单词。

1.  Can I b ____ your bike? Mine is broken.

2.  I want to i____ you to my birthday party.

3.  Could you please f ____ my dog for me when I am away?

4. We need more drinks and s____. Could you buy some?

5.  Lily likes traveling by train, but she h____ traveling by ship.

Seventy percent of the students _____ taken part in the work and seventy percent of the

work _____been finished. [ ]

A. has, has  

B. had , had  

C. has, have    

D. have, has

下列叙述不正确的是（   ）

A．若_aX^m+ 和_bY^n－两种离子电子层结构相同，则a-b=n-m

B．²⁴Mg³²S晶体中电子总数与中子总数之比为1︰1

C．CO₂和PCl₃分子中各原子最外层都满足8电子结构

D．ⅥA族元素的氢化物中，稳定性最好的其沸点也最高

左旋多巴应用初期，最常见的不良反应是

A．迟发性运动障碍
B．开-关现象
C．胃肠道反应
D．精神障碍
E．心律失常

正常肝组织在有氧条件下由糖酵解供能占（）。

A.50%

B.10%

C.30%

D.1%

E.80%