下列选项中，设有（）的基础必须分开。 A.伸缩缝 B.沉降缝 C.圈梁 D.地梁

周乙的父母能否代为赔偿

阅读理解。

     Alex is going to study in Chicago for a year. He's reading a travel (旅游) book about the weather,

which says: it's usually cool in spring. Sometimes it rains. It's usually hot and sunny in summer. It's

normally cool and windy in autumn. It gets very cold in Chicago in winter.

     He asks himself, "What can I do there during that time? Oh, I can have a lot of free time in summer.

In autumn, I can't have a lot of free time because I'll be in school. I can play football. I can't go

ice-skating, because I don't know how to ice-skate. Then I can visit my family in Florida at Christmas

and New Year and get some sunshine. "

1. What's Alex going to do?       

A. He's reading a book.        

B. He is going to Chicago to learn.        

C. He's going on vacation.        

D. He's visiting Chicago.

2. Alex is reading a travel book because he wants to _____.       

A. know the interesting places in Chicago        

B. travel to Chicago        

C. learn about the weather        

D. study the history about Chicago

3. What's the weather like in summer?       

A. Cool.                      

B. Rainy.       

C. Cool and windy.       

D. Hot and sunny.

4. When can he have much free time?        

A. In November.              

B. In September.        

C. In April.                   

D. In October.

5. Alex can't _____ in winter.      

A. play football       

B. go ice-skating       

C. visit his family       

D. get some sunshine

白炽灯的灯丝永久了之后，灯丝由于升华而变细，这时灯丝的电阻怎么变？接在原来的电源上，通过灯丝的电流怎么变？为什么？

下列指标中，不是用于衡量SDH系统接收部分性能的指标是（）。

A、抖动容限

B、频偏容限

C、色散容限

D、光通道代价

DRX解决方案的关键组件包含哪些（）

A.高性能服务器

B.共享存储

C.负载均衡设备

D.CAS云管理平台