只就精于数量而言，哪一项具备正常生育能力A．精子数在1500万～2500万/ml B

阅读理解。

     Some people remember things by writing to themselves. Then they leave the notes in obvious places,

such as on the table or on the floor in the middle of the living room. I don't think I like to write notes to

myself. Most of the time I lose them or forget to look at them until it's too late. I prefer to use an alarm

clock to tell me what I should do. I have ten alarm clocks in my house. They could tell me about things.

For example, if I have to make a telephone call at a certain time, I'll set an alarm clock to go off a few

minutes early and put the clock by the telephone. Or if I want to watch a certain television program, I'll

set an alarm clock at the right time and put the clock on top of the TV set. I can remember almost

anything if I use my clocks. However, sometimes an alarm clock goes off and I don't know what it means. I always remember setting it, but not why I Set it. If the clock is by the telephone, I know I may have set

it to tell me to call someone, but I can't be sure. I might have set it to tell myself that somebody was to

call me at a certain time.

1. Some people like to write notes to themselves so that they can                 .

A. leave them in obvious places

B. remember what to do at a certain time

C. watch a certain program

 D. make a phone call at a certain time

2. I don't like to write notes to myself because                 .

A. they are easy to lose or forget to look at

B. I don't know where to put them

C. my handwriting is poor

D. it gives me too much trouble

3. I often use                  to help me remember things.

A. a note book

B. a computer

C. telephone calls

D. alarm clocks

4. Sometimes an alarm clock can't help me because                  .

A. I put the clock in a wrong place

B. the clock goes wrong

C. when the clock goes off, I forget why I set it

D. I'm not sure whom I should call

5. In this passage "go off" means                   .

A. start off

B. get off

C. go away

D. make a sudden noise

下列各项中，不属于企业全面风险管理商业使命的是（）。

A.损失最小化管理

B.不确定性管理

C.绩效最优化管理

D.财务管理

非辐射复合主要有哪几种？

暗配管要有一定的埋设深度，太深不利于与盒箱连接，有时剔槽太深会影响墙体等建筑物的质量；太浅同样不利于盒箱连接，还会使建筑物表面有裂纹，在某些潮湿场所(如实验室等)，钢导管的锈蚀会印显在墙面上，所以埋设深度要恰当，既保护导管又不影响建筑物质量。( )

简述舒婷诗歌的主要思想。