下列有助于耳硬化诊断的是（） A.无明显原因的与年龄不相符的感音性聋 B.CT或MR

阅读理解。

     Mary and Linda are sisters. They are in the same school in Beijing. They ride bikes to school from

Monday to Friday. On Saturday and Sunday, they are usually very happy, because they needn't go to school

any more. On Saturday morning they go to see their grandparents by bus. There they have lunch together.

In the afternoon they often go to some places of interest in Beijing. Their favorite place is Tian'an men Square.

They like flying kites. In Spring, they often fly kites there on Sunday morning. In the afternoon they do their

homework for about one hour. They always watch the weather report (天气预报) on TV in the evening. So

they know a lot about weather.

1. Mary and Linda are __________.

A. good friends

B. classmates

C. sisters

D. pen friends

2. How do Mary and Linda go to school?

A. By bike

B. By car

C. on foot

D. By bus

3. Where do Mary and Linda often have lunch on Saturday?

A. At home.

B. At their grandparents' home.

C. In a restaurant.

D. At their friends' home.

4. What do Mary and Linda never do on Sundays?

A. Fly kites.

B. Do their homework.

C. Watch the weather report.

D. Play football.

5. The two girls are interested in ________.

A. foods

B. plants

C. weather

D. clothes

信息系统开发的基本内容包括下面Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ等五条中的( ) Ⅰ．系统建设的可行性研究 Ⅱ．系统研制队伍的建立 Ⅲ．系统开发策略、方法和步骤的选择和确定 Ⅳ．开发工具和开发环境的选择和提供 Ⅴ．系统的设备配置和数据库总体设计

A．Ⅱ、Ⅲ、Ⅳ、Ⅴ

B．Ⅲ、Ⅳ、Ⅴ

C．全部

D．Ⅰ、Ⅱ、Ⅲ、Ⅳ

下列四种语言中属于关系数据库标准语言的是( )。

A．C+ +

B．SQL

C．Pascal

D．QBaisc

大型技术相机调整对焦屏的方式有（）。

A、定所需构图

B、确定直拍或横拍

C、旋转对焦屏

D、粗略对焦

E、精确对焦

F、察看景深

金丝球焊的优点是无方向性，键合强度一般（）同类电极系统的楔刀焊接。