对于多元线性回归模式，F检验和t检验（）。A．两种检验说明的问题不同 B．两种检验的

平抛运动是（　　）

A．匀速率曲线运动

B．匀变速曲线运动

C．加速度不断变化的曲线运动

D．加速度恒为重力加速度的曲线运动

在数字通信系统中常使用（ ）

A．码分复用技术

B．空分复用技术

C．时分复用技术

D．频分复用技术

特种蛋白免疫分析仪是基于抗原一抗体反应原理，不溶性免疫复合物可使溶液浊度改变，再通过浊度检测标本中微量物质的分析方法。

免疫浊度分析的必备试剂不包括（）.

A.多抗血清（R型）

B.高分子物质增浊剂

C.20%聚乙二醇

D.浑浊样品澄清剂

E.校正品

When I learned that 71-year-old mother was playing Scrabble —a word game, I knew I had to do something. My husband suggests we give her a computer to play against herself. I wasn’t sure whether my mother was ready for it. After all, it had taken 15 years to persuade her to buy an electric cooker. Even so, we packed up our old computer and delivered it to my parents’ home. And so began my mother’s adventure in the world of the computers.

It also marked the beginning of an unusual teaching task for me. I’ve taught people of all ages, but I never thought I would be teaching my mother how to do anything.

She has been the one teaching me all my life: to cook and sew; to enjoy the good times and put up with the bad. Now it was my turn to give something back.

   It wasn’t easy at the beginning. There was so much to explain and to introduce. Slowly but surely, my mother caught on, making notes in a little notebook. After a few months of Scrabble and other games, I decided it was time to introduce her to word processing. This proved to be a bigger challenge to her, so I gave her some homework. I asked her to write me a letter, using different letter types, colors and spaces. 

“Are you this demanding with your kindergarten pupils?” she asked.

“No, of course not,” I said.”They already know how to use a computer.”

 My mother isn’t the only one experiencing a fast personal growth period. Thanks to the computer, my father has finally got over his phone allergy(过敏). For as long as I can remember, any time I called, my mother would answer. Dad and I have had more phone conversations in the last two months than we’ve had in the past 20 years.

小题1:What does the author do?

A．She is a cooker

B．She is a teacher

C．She is a housewife

D．She is a computer engineer小题2:The author decided to give her mother a computer _____.

A．to let her have more chances to write letters

B．to support to her in doing her homework

C．to help her through the bad times

D．to make her life more enjoyable小题3:The author asked her mother to write her a letter _____.

A．because her mother had stopped using the telephone

B．because she wanted to keep in touch with her mother

C．so that her mother could practice what she had learned

D．so that her mother could be free from the housework

举报人可当面举报或（）举报。