影响骨折愈合的因素最重要的是A．患者的年龄 B．营养状况 C．骨折部位的血液供应情况

阅读理解。

    I'm Mary. I have a piece of good news to tell you. My parents bought a new flat in

the centre of the city. The rooms are not big, but they are all comfortable. There are

more rooms than our old flat. I am excited (激动) because I have my own bedroom.

In the old flat, I share the bedroom with my sister.

    My favourite room in the new flat is my bedroom. I can be alone (单独) in it. It is

my own small world. I can listen to music, read comics and chat with my friends on

the phone. I can also look for things on the Internet and send e-mails to my e-friends.

    Kitchen is my favourite room, too. I like helping my mother with the cooking. She is

not only a good teacher but also a good cook. She often teaches me how to make some

different dishes. She lived in Sichuan when she was a child. So she likes hot food and

she can cook very delicious hot food.

1. What's Mary's new flat like? [ ]

A. Big and comfortable

B. Small and not comfortable

C. Big but not comfortable

D. Small but comfortable

2. Mary can do the following things in the bedroom except (除了) _____. [ ]

A. play the piano

B. chat with her friends

C. send e-mails

D. listen to music

3. Which room does Mary like best? [ ]

A. The kitchen

B. Her bedroom

C. The sitting room

D. Both A and B

4. What does Mary's mother do? [ ]

A. A teacher.

B. A nurse.

C. A housewife.

D. A worker.

5. Where did Mary's mother live when she was a child? [ ]

A. The old flat

B. The centre of the city

C. Sichuan

D. The new flat

蛋白质的生物合成过程始于（）

A.核糖体的组装

B.mRNA在核糖体上的就位

C.氨基酸的活化

D.氨基酸的进位

E.氨基酸的合成

瓦特改良蒸汽机产生的重大变化和影响有（    ）

①解决了工业发展的动力问题     ②出现了发明和使用机器的热潮

③使世界的经济和文化联系日益密切 ④使交通运输业发生了彻底改变

A．①②③

B．①③④

C．①②③④

D．①②④

履约保证金一般为多少？

在病虫害防治工作中，配制农药的常用方法是（）。

A.百分比浓度

B.倍数法浓度

C.百万分比浓度

D.千分比浓度