（） A． B． C． D．

任何一条线段都是轴对称图形．______．

一定条件下，通过下列反应可实现燃煤烟气中的硫的回收：SO₂(g)＋2CO(g)2CO₂(g)＋S(l) △H＜0。一定温度下，在容积为2L的恒容密闭容器中1molSO₂和nmolCO发生反应，5min后达到平衡，生成2amolCO₂。下列说法正确的是

A．反应前2min的平均速率v(SO₂)＝0.1amol/(L.min)

B．当混合气体的物质的量不再改变时，反应达到平衡状态

C．平衡后保持其它条件不变，从容器中分离出部分硫，平衡向正反应方向移动

D．平衡后保持其他条件不变，升高温度和加入催化剂，SO₂的转化率均增大

在对机床进行（）测量时，测点不少于（），不得有障碍物。

阅读理解。

     Margaret, married with two small children, has been working for the last seven years as a night

cleaner, cleaning offices in a big building.

     She trained as a nurse, but had to give it up when her elder child became seriously ill. "I would have

liked to go back to it, but the shifts (工作班次) are all wrong for me, as I have to be home to get the

children up and off to school."

     So she works as a cleaner instead, from 9 p.m. till 6 a.m. five nights a week for just ￡90, before tax

and insurance. "It's better than it was last year, but I still think that people who work 'unsocial hours'

should get a bit extra."

     The hours she' s chosen to work meant that she sees plenty of the children, but very little of her

husband. However, she doesn't think that puts any pressure on their relationship.

     Her work isn't physically very hard, but it's not exactly pleasant, either. "I do get angry with people

who leave their offices like a place for raising pigs. If they realized people like me have to do it, perhaps

they'd be a bit more careful."

     The fact that she's working all night doesn't worry Margaret at all. Unlike some dark buildings at night

, the building where she works is fully lit, and the women work in groups of three. "Since I've got to be

here, I try to enjoy myself-and I usually do, because of the other girls. We all have a good laugh, so the

time never drags."

     Another challenge Margaret has to face is the reaction of other people when she tells them what she

does for a living. "They think you're a cleaner because you don't know how to read and write," said

Margaret. "I used to think what my parents would say if they knew what I'd been doing, but I don't think

that way any more. I don't dislike the work though I can't say I'm mad about it."

1. Margaret quit her job as a nurse because _______

A. she wanted to earn more money to support her family

B. she had suffered a lot of mental pressure

C. she needed the right time to look after her children

D. she felt tired of taking care of patients

2. Margaret gets angry with people who work in the office because _______.

A. they never clean their offices

B. they look down upon cleaners

C. they never do their work carefully

D. they always make a mess in their offices

3. When at work, Margaret feels _______.

A. light-hearted because of her fellow workers

B. happy because the building is fully lit

C. tired because of the heavy workload

D. bored because time passed slowly

4. The underlined part in the last paragraph implies that Margaret's parents would _______．

A. help care for her children

B. regret what they had said

C. show sympathy for her

D. feel disappointed in her

五七岁女性患者，绝经2年，少许 * * 流血伴 * * 少许脓性物2月，妇科查体（-）。

如术中发现膀胱有转移灶，应（）

A.B+C

B.放疗

C.化疗

D.手术

E.中药