砂炒醋淬鳖甲，每100kg药物用醋的量是（） A.5kg B.10kg C.

在一定温度下的定容容器中，当下列物理量不再发生变化时，表明反应：A（s）+2B（g）⇌C（g）+D（g）已达平衡状态的是（　　）

A．混合气体的压强

B．混合气体的密度

C．A的密度

D．气体总物质的量

阅读理解。

     There are 45 students in our class. I have made a survey, 36 students say they like to exercise.

Most boys play basketball together twice a week. But girls think basketball is difficult for them,

they'd like to play volleyball together twice a week. My friend, Tony, is good at running. He runs

fastest (最快) in our class. He runs for 30 minutes on the playground every evening before he

goes to bed. Is it interesting? Gray is good at swimming. He goes to the swimming club three

times a month in winter, and three times a week in summer. So he is pretty healthy. Some of

my classmates have good eating habits. They eat both meat and vegetables. 70% of them drink

milk every day. 15 students say they drink milk three or four times a week. But some students

like to eat junk food, especially Sally. What's worse (更糟糕的) is that she doesn't like to exercise,

so she is very fat. She always says " I'm going to lose weight (减肥) tomorrow."

1. How often do most boys play basketball? [ ]

A. Every day.

B. Twice a day.

C. Twice a week.

D. Twice a month.

2. Why do the girls dislike to play basketball?  [ ]

A. Because they have no time.

B. Because they think it is not easy.

C. Because they don't like to play with the boys.

D. Because they don't like to exercise.

3. When does Tony often run for 30 minutes? [ ]

A. Every morning.

B. Every afternoon.

C. Every evening before he goes to bed.

D. Every evening before supper.

4. How often does Gray swim in winter? [ ]

A. Three times a month.

B. Three times a week.

C. It isn't mentioned in the passage.

D. Hardly ever.

5. Why is Sally so fat? [ ]

A. Because she doesn't like to exercise.

B. Because she likes to eat junk food very much.

C. Because she eats too much meat, but doesn't exercise.

D. Because she doesn't like to exercise, and she likes to eat junk food.

解释下面词语。

①缓冲：________________________

②伧俗：________________________

下图是“我国郑渝（郑州至重庆）高速铁路规划图（初步规划有①、②线两种方案）”，读图回答下题。

夏秋季节，①线经过的甲地附近有夜间多雨的现象。关于其原因的叙述，不正确的是

A．夏秋季节，空气中水汽含量大            

B．谷底暖湿空气下沉，易形成降雨

C．处于河谷，水汽含量丰富

D．河谷地形，夜间山坡因辐射冷却，冷空气沿坡地向下流入谷底

简述道德的概念及其包括的主要内容。