In relation to the courts’ powers to inter

测定土的含水量就是测土中自由水的百分含量。

L湖原是新疆最大的淡水湖，近年来已演变成微咸水湖。现在该湖西部沿岸芦苇广布，而东部沿岸几乎没有。下图示意L湖及周边地区，读图回答小题。

小题1:正确描述甲、乙两河与L湖相互关系的是(　　)

A．甲河秋季输入L湖泥沙最多

B．甲河流量变化深受L湖影响

C．乙河是L湖重要补给水源

D．乙河对L湖具有排盐作用小题2:对L湖东、西两岸芦苇分布差异影响最小的因素是(　　)

A．主导风向　　　　　　

B．湖水盐度

C．沿岸坡度

D．土壤肥力

     Each new school year brings fresh reminders of what educators call the summer learning gap. Some

call it the summer learning setback. Put simply, it means the longer kids are out of school, the more they

forget. The only thing they might gain is weight. Recent studies show that children gain weight more

quickly in the summer vacation than when they are in school.

     Most American schools follow a traditional nine-month calendar. Students get winter and spring

breaks and about ten weeks of summer vacation. Some schools follow a year?round calendar. They

hold classes for about eight weeks at a time, with a few weeks off in between. But many experts point

out that the number of class days in a year-round school is generally the same as in a traditional school.

     Last year, a study at Ohio State University reported that year-round students did not learn any more

than other students. Lead researcher Paul von Hippel said "year-round schools don't really solve the

problem of the summer learning setback. They simply spread it out across the year".

     Across the country, research shows that students from poor families fall farther behind over the

summer vacation than other students. Experts say this can be prevented. They note that many schools

and local governments offer the programs that can help.

     But calling them "summer schools" could be a problem. The director of the summer learning center

at Johns Hopkins, Ron Fairchild, recently wrote about this issue on his blog.

     He said that in American culture, the idea of summer vacation is connected to the beliefs about

freedom and the joys of childhood. He said research with groups of different parents in Chicago and

Baltimore found that almost all strongly disliked the term summer school. They said it created an image

of children being forced to do work they missed during the school year.

1. Which of the following is the result of the long summer vacation?

A. Kids become much stronger.

B. More kids drop out of school.

C. Kids become poor in learning.

D. Kids take part in all kinds of activities.

2. Some American schools have their vacations ________.

A. every two months  

B. every few weeks

C. every three months  

D. every four months

3. The study at Ohio State University suggests that ________.

A.  the traditional calendar is better than the year－round one

B. the year-round calendar is better than the traditional one

C. the traditional calendar is as bad as the year-round one

D. the year-round calendar is the same as the traditional one

4. The summer vacation is most likely to have bad effect on the kids ________.

A. who are too young  

B. whose families are poor

C. who are too naughty  

D. who don't work hard

5 According to American culture during the summer vacation kids ________.

A.  should try their best to improve their lessons

B. must choose to take part in one of the programs

C. should do what they like and enjoy themselves

D. must be forced to make up for their poor lessons

在公共政策执行的起始环节中，核心内容是( )。

A．目标宣传
B．任务宣传
C．意义宣传
D．方法和步骤宣传

防爆电机安装前须用( )V绝缘电阻表测量电机绕组的对地绝缘电阻。

A．500

B．1000

C．2500

D．1500