生物进化的历程不包括下列哪项( ) A.由水生到陆生 B.由低等到高等 C.由个

题型:选择题

问题:

生物进化的历程不包括下列哪项(  )

A.由水生到陆生

B.由低等到高等

C.由个体到群体

D.由简单到复杂

考点:进化的历程
题型:选择题

视波长

题型:选择题

相隔一段距离的两个点电荷,它们之间的静电力为F,现使其中一个点电荷的电量变为原来的两倍,同时将它们之间的距离也变为原来的两倍,则它们之间的静电力变为(  )

A F/2      B 4F      C 2F      D F/4

题型:选择题

流行性腮腺炎可出现腮腺管开口处黏膜红肿,其部位在()。

A.上颌第2臼齿相对应的颊黏膜上

B.下颌第2臼齿相对应的颊黏膜上

C.舌下

D.上颌第1臼齿相对应的颊黏膜上

E.下颌第1臼齿相对应的颊黏膜上

题型:选择题

共5小题;每小题2分,满分10分)

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多于选项。(请把答案填在答案卷的横线上)

Today we begin a series of programs about learning disabilities.These are disorders in the ways that people understand or use language.They can affect the ability to listen or think, or to speak or to read and write.They can also affect the ability to do mathematics.小题1: Researchers believe that learning disabilities are caused by differences in the way that the brain works with information. They say children with learning disabilities are not unintelligent or do not want to work.小题2:

Researchers say that as many as one out of every five people in the United States has some  kind of learning disability.Almost three-million children in the United States receive some kind of help in school for a learning disability.

小题3:  Expels look for a difference between how well a child does in school and the level of intelligence or ability of the child.But there is no one sign of a disorder.A few signs of learning disability include not connecting letters with their sounds or not understanding what is read.A person with a learning disability may not be able to understand a funny story.They may not follow directions.They may not read numbers correctly or know how to start a task.小题4:  One  person may have trouble understanding mathematics.Another may have difficulty understanding what people are saying.Still another may not be able to express ideas in writing.These different kinds of learning disabilities are known by different names.For example,a person who has difficulty reading may have dyslexia(诵读困难症).

Experts say learning disabilities cannot be cured.小题5:   Teachers and parents can help young people with learning disabilities to learn successfully.

A.Different people have different kinds of learning disabilities.

B.Their brains just process information differently than other people.

C.People with learning disabilities have difficulty in communicating with others

D.But people who have them can be helped.E. Why does a person have a learning disability.

F. A person with a learning disability has unusual difficulty in developing these skills.

G. How can you tell if someone has a learning disability?

题型:选择题

北岛离开祖国的时间是()。

A、1989年11月

B、1987年10月

C、1988年3月

D、1989年4月

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