空气呼吸器的使用说明是（）。A、空气呼吸器报警逃生压力为10MPa B、空气呼吸器报

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     Hello, I'm Dave. My school is in the centre of my town. I lived in the countryside before, because

Mum thought it was quiet there. It took me about an hour to go to school by bike. It was difficult for

me to get to school before eight o'clock in winter if(如果) it snowed. Sometimes I was late for class.

My teacher was a little angry with me. I had to get up before five thirty in the morning. I was always

tired in the evening. I told my parents about it. Last month Dad found a job in a supermarket in the

town. We moved to a house there. It's not far from the bus station and I can take the bus to school.

It takes me only fifteen minutes. Now I don't worry about(担心) being late for school. And sometimes

I can play football with my friends after dinner.

1. Dave's mum thought it was ______to live in the countryside.  

A. interesting  

B. exciting

C. quiet

D. surprising

2. Dave's teacher was angry with him because he ______.  

A. couldn't finish his homework

B. got bad marks

C. often fought(打架)with other boys

D. was late for school sometimes

3. Dave was always ______in the evening one month ago.  

A. happy  

B. tired

C. relaxed

D. sad

4. Now Dave goes to school _______.  

A. by bus  

B. by bike

C. by train

D. on foot

5. Now sometimes Dave ________ after dinner.

A. watches TV  

B. does homework

C. takes a walk

D. plays football with friends.

房地产开发企业在计算转让新建房的土地增值税时，允许作为"与转让房地产有关的税金"项目单独扣除的有（）。

A.营业税

B.印花税

C.契税

D.城建税

潜水艇是靠改变______来实现浮沉的．气球、飞艇的里面装着______比空气小的气体，当气球或飞艇受到的浮力______（填“等于”、“小于”、“大于”）气球飞艇自重加载时，气球、飞艇就能上升．

患者，男性，68岁，高血压病史15年，因突发心前区压榨样疼痛伴憋喘4小时入院。2年前有脑出血史。体检：神志清，两肺闻及湿啰音，心率126次／分，心律绝对不齐，第一心音强弱不等。心电图是P波消失，代之以大小不等的f波，心室率116次／分，QRS时限0．104S，V1、V2呈rsR型，呈QRS型，ST段弓背向上抬高0．3～0．5mV，T波倒置。

治疗应包括（）

A.胺碘酮

B.利多卡因

C.补钾

D.硫酸镁静脉注射

E.阿托品

F.异丙肾上腺素