产前用药对胎儿娩出后继续起作用，对胎儿危险的原因是（） A.药物的易化扩散 B.药物

阅读理解。

     Taking an after-school class will give you a head start in high school. But if it means walking home

every day, even in snow and rain, would you do it?

     I did. I took part in an after-school Spanish class. Because it was after school, no school buses were

there to take me home when the class ended. And my parents couldn't pick me up, so I had to walk home.

     At first I hated the walk because of the long distance. But after a few months, I got used to (习惯于)

it and it became one of my daily activities, like getting dressed and brushing my teeth. And I began to

enjoy it. I got to see things like birds flying and trees changing color. A few times I saw something very

special, like a small snake near the sidewalk, or two cars that came very close to crashing!

     Many of my classmates saw what I did. Once, one girl in my class asked her mother to drive me

home because it was raining outside, and I didn't have an umbrella (雨伞). Some people who I didn't

know even gave me a ride - they thought it was too cold out.

     People always think walking long distances is difficult. Modern technology (技术) makes common

things, like walking, seem impossible. Many people, like myself, live in the country and are close to

nature, but also far away from it because of technology.

1. What class did the writer take part in after school?

A. Math class    

B. Spanish class  

C. Art class

D. English class

2. When did the writer begin to enjoy walking home?

A. At the very beginning.    

B. After a week.  

C. After a few months.      

D. After a year.

3. Why did the writer begin to enjoy walking home?

A. Because something interesting happened on the road every day.

B. Because the writer could get a ride from some strange people.

C. Because the writer enjoyed walking in the rain alone.

D. Because the writer could enjoy some interesting things happening on the road.

4. When it was a rainy or snowy day, ______.

A. some kind people would give him a ride

B. nobody saw him and nobody helped him

C. the writer would choose to stay at school

D. the writer's parents would come to pick him up

5. What does the last paragraph want to tell us?

A. It is difficult for many people to walk long distances.

B. Modern technology brings people a lot of inconvenience (不方便).

C. Modern technology makes people live better, but farther from the nature.

D. It is impossible for people to walk a long distance nowadays.

山西省高速公路联网路段于什么时候实施非现金刷卡收费？

制作人口腔上皮细胞的临时装片的正确顺序是（　　）

①在载玻片中央滴一滴生理盐水 ②取口腔上皮细胞 ③把从口腔内取出的碎屑涂在载波片的水滴中 ④盖盖玻片 ⑤滴稀碘液染色 ⑥擦干净载玻片和盖玻片．

A．⑥②①③④⑤

B．⑥①②③④⑤

C．②⑤①④③⑥

D．⑥①④③②⑤

按照( )划分，产业政策一般包括产业结构政策、产业组织政策、产业技术政策和产业布局政策等内容。

A．政策任务

B．政策目标

C．政策需求

D．政策性质

过量输液导致肺水肿的直接原因是什么?