酸和碱的反应称（）。A.中和反应 B.置换反应 C.加成反应

在贵州目前自治州中唯一的一个自治县是（）自治县。

阅读理解

      What do working mothers worry about the most? It's the kids of course. Whatever the setting, the

question I get asked the most is "Will the kids be alright?" It's made me realize that we tend to look at the

glass half-empty rather than half-filled when it comes to mixing work and family. We forget about all the

benefits that we bring to our children when we work - and I'm not talking about the obvious financial

benefits, although these of course shouldn't be taken for granted.

     About a year ago I remember getting a call from the school just as I was pulling up to the house after

having driven 20 minutes to the school and 20 minutes back. "Mrs. Brown Quinn, your son asked us to

call. He forgot his sports clothes. Can you come back to the school and drop them off?" I was exasperated(恼火)! I had already spent 40 minutes in aggressive weekday morning traffic. I replied, "Sorry, I'm

working at the moment. I'm afraid my son needs to learn to be organized."

     Being a good parent requires delivering tough love sometimes. Kids need to learn to be independent.

It can be a cruel and competitive world out there. Seeking   interests, including business, outside of your

kids, can give you that extra idea that you need not care for your kids with attention. This benefit of

working isn't always immediately evident.

     It wasn't until our daughter went away to college that she realized why we had raised her in the way

that we did. "Mom, I can't believe how so many of my friends struggle to manage things on their own.

They are constantly calling their parents for help." You'll love that moment! After all those years of

complaining about why you don't do this or why you don't give them that, your kids realize that tough

love has made them better people.

1. The author refused to drop off her son's sports clothes because ______.

A. she was caught in heavy traffic

B. she was busy working

C. she thought her son was lying

D. she wanted her son to be organized

2. How can kids become better people according to the author?

A. By giving them all your attention.

B. By giving them freedom to do things on their own.

C. By showing them your deep love.

D. By giving them tough love.

3. The daughter's attitude towards the author is ______ when she grows up.

A. surprised

B. caring

C. understanding

D. disappointed

4. The purpose of the author is to ______.

A. throw light on a special benefit of working

B. advise us to mix work and family

C. argue for working mothers

D. describe her own experience in raising children

中国原始农业是在采集经济中为开辟食物来源而发明的。

基层单位坚持每天三个“半小时”：即早间收听中央人民广播电台的《新闻和报纸摘要节目》半小时，下午操课前读报半小时，晚间收看中央电视台《新闻联播》半小时。

试述电控动力转向系统的故障诊断过程。