如果-2，a，b，c，-8成等比数列，则ac=______，b=______．

阅读理解。

      You want to know about life in the past. Right? I can tell you. When I was a  boy, things were 

different. I had to get up at six every morning. That was not  very bad in summer, but in winter it was

 cold. And we didn't have any hot water  in the house. We had to wash in cold water. We didn't have

 a bathroom (浴室). My  dad had some chickens. I had to feed (喂养) them every morning and then I

 had to  walk to school with my little sister. It was about two miles (英里) to school and  about two 

miles back in the evening. But it always seemed longer in the morning  when we were going to school. 

There was a bus, but we didn't have any money. And  we had to go to bed at eleven o'clock every 

night because I had too much  homework and housework to do. We couldn't watch TV because there 

wasn't any. On  Sundays we had to go to church (教堂) three times －morning, afternoon and evening. 

And we couldn't play outside on Sundays. But it wasn't all bad. We had some good  times (时光). We 

could go out and our parents didn't have to worry about us. There  weren't so many cars on the roads 

then, so the streets were safe to play in. And  there were not many robbers and thieves in those days. 

We had to work hard and  we weren't able to buy all those things in the shops today. Life was hard, 

but  it was simple (单纯的) and people were happier. I don't think I'd like to be young  today.

1. The writer usually went to bed ______ every night.

A. at six        

B. at eight              

C. at nine        

D. at eleven

2. The writer walked about ______ every day.

A. two miles          

B. three miles        

C. four miles          

D. five miles

3. Every morning the writer had to feed ______. 

A. his little sister           

B. his lovely dog

C. his chickens            

D. his father's chickens

4. The writer had a ______ but ______ family.

A. rich; happy        

B. poor; happy              

C. hard; poor        

D. rich; hard

5. Which of the following is NOT TRUE?

A. The writer had a little sister.

B. The writer couldn't take the school bus.

C. The writer and his sister never had any good times.

D. The write had to get up at six.

计算：（-3）²=______．

原发性小血管炎不包括（）

A.显微镜下多血管炎

B.韦格纳肉芽肿

C.变应性肉芽肿性血管炎

D.结节性多动脉炎

E.局灶节段坏死性肾小球肾炎

治疗血瘀气滞，经行腹痛，兼风湿肩臂疼痛者，应首选

A．桃仁
B．丹参
C．红花
D．姜黄
E．益母草

关于破伤风梭菌，错误的是

A．专性厌氧

B．周身鞭毛

C．皮肤破损伤口传染

D．可引起食物中毒

E．外毒素毒性强烈