问题 选择题

下列操作或现象与解释不一致的选项是                   (    )

答案

答案:A

A、水烧开后,水分子之间的间隔变大,体积变大,能把壶盖冲起,分子的大小没有变化,所以A错误;

B、在花园中可闻到花的香味,原因是分子在不断运动,香味分子运动到空气中,进入人们的鼻孔,所以B正确;

C、100mL酒精和100mL水混合在一起,体积小于200mL,原因是分子间有间隔,所以C正确;

D、加热氧化汞可得到金属汞和氧气,原因是分子是可以再分的,所以D正确.

故选A.

阅读理解

任务型读写。阅读下列短文,根据所读内容在文章后表格中的空格中填入恰当的单词。

注意:每个空格只填入一个单词。

     About six years ago, I was eating lunch in a restaurant in New York City when a woman and a young

boy sat down at the next table. I couldn't help overhearing parts of their conversation. At one point the

woman asked, " So, how have you been?" And the boy---who could not have been more than seven or

eight years old replied, "Frankly, I've been feeling a little depressed lately."

     This incident (小事) stuck in my mind because it confirmed my growing belief that children are

changing. As far as I can remember, my friends and I hardly found out we were " depressed" until we were in high school.

     The evidence of  changes in children has increased steadily in recent years. Children don't seem

childlike anymore. Children speak more like adults, dress more like adults and behave more like adults

than they used to.

     Whether this is good or bad is difficult to say, but it certainly is different. Childhood as it once was no

longer exists. Why?

     Human development is based not only on natural biological states, but also on patterns of access to

social knowledge. Movement from one social role to another usually involves learning the secrets of the

new situation. Children have always been taught adult secrets, but slowly and in gradual stages:

traditionally, we tell sixth graders things we keep hidden from fifth graders.

     In the past 30 years, however, a secret-revelation (提示) machine has been installed in 98 percent of

American homes. It is called television. Television passes information, and indiscriminately (不加区分地), to all viewers alike, whether they are children or adults. Unable to resist the temptation (诱惑), many

children turn their attention from printed texts to the less challenging, more vivid moving pictures.

     Communication through print, as a matter of fact, allows for a great deal of control over the social

information to which children have access. Reading and writing involve a complex code of symbols that

must be memorized and practiced. Children must read simple books before they can read complex

materials.

Title: (1)_____ in Today's Children

Main comparisonsContexts

Different(2)_____ Children in the past just did what they were(3)_____ to.

Children today act as if they were (4)_____.

Different(5)_____ Children in the past(6)_____ experienced depression in the author's view.

Sometimes sadness (7)_____ to children nowadays.

Different

(8)_____ to get knowledgeChildren in the past got knowledge  in (9)_____ and guided stages.

Children nowadays get some knowledge by (10)_____ TV without control.

多项选择题