对传染性单核细胞增多症有诊断意义的是（） A.原始淋巴细胞增多 B.幼稚淋巴组织增多

著名的 SNMP 协议使用的公开端口为______。

A．TCP 端口 20 和 21

B．UDP 端口 20 和 21

C．TCP 端口 161 和 162

D．UDP 端口 161 和 162

Each new school year brings fresh reminders of what educators call the summer learning gap. Some call it the summer learning setback. Simply speaking, it means the longer kids are out of school, the more they forget. The only thing they might gain is weight.

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. The National Association for Year-Round Education says there were fewer than three thousand such schools at last count. They were spread among forty-six of the fifty states.

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. 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 than other students. Experts say this can be prevented. They note that many schools and local governments offer programs that can help.

But calling them "summer school" could be a problem. The director of the summer learning center at Johns Hopkins, Ron Fairchild, said research with groups of different parents in Chicago and Baltimore found that almost all strongly disliked the term summer school”. In American culture, the idea of summer vacation is connected to beliefs about freedom and the joys of childhood. The parents welcomed other terms like "summer camp," "enrichment," "extra time" and "hands-on learning."

小题1:According to the first paragraph the summer learning gap         .

A．helps children to gain weight

B．leads children to work harder

C．improves children’s memories

D．affects children’s regular studies小题2:Compared to traditional schools, students in the year-round ones          .

A．perform better and have more learning gains

B．have much less time for relaxation every year

C．have generally the same number of class days

D．hold more classes with more free weeks off小题3:Which of the following statements is true?

A．Students from poor families often fall behind after the vacation.

B．Year-round schools can solve the problem of the learning gap.

C．There are schools in each state following a year-round calendar.

D．Nothing can help the students who fall behind after the vocation.小题4:Why did almost all parents dislike the term “summer school”?

A．They cherish the children’s rights of freedom very much.

B．They are worried about the quality of the “summer school”.

C．They want their children to be forced to make up the gap.

D．They can’t afford to the further study during vacation.小题5:What would be the best title of this passage?

A．Opening Summer Camps

B．Forbidding Summer Schools

C．Spreading Year-Round Education

D．Minding the Summer Learning Cap

人体基本活动的方式是：走、跑、跳、投、、等。