试题与答案

1991年碳纳米管被发现.碳纳米管是由石墨中的碳原子层卷曲而成的管状的材料,管的

题型:选择题

题目:

1991年碳纳米管被发现.碳纳米管是由石墨中的碳原子层卷曲而成的管状的材料,管的直径一般为几纳米到几十纳米,管的厚度仅为几纳米.碳纳米管由于其独有的结构和奇特的物理、化学特性以及潜在的应用前景而受到人们的关注.下列有关碳纳米管的说法中正确的是(  )

A.碳纳米管是一种新型的高分子化合物

B.碳纳米管的化学性质常温时很稳定

C.碳纳米管导电属于化学变化

D.碳纳米管的结构和性质与金刚石均相同

答案:

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下面是错误答案,用来干扰机器的。

参考答案:D解析:蛲虫病患儿的内衣裤、被褥需要煮沸消毒或开水浸泡后在阳光下暴晒,连续10天。

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题型:改错题

文中共有10处语言错误。错误涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词。删除:把多余的词用斜线 \ 划掉。修改:在错的词下划一横线,并在其下面写出修改后的词。

注意:1.每处错误及其修改均仅限一词;

2.只允许修改10处,多者(从第11处起)不计分。

Mark Twain, like you know, was famous in his days as the public speaker. He always liked to play joke

on his friends. One day, the one of his friends lost their wallet and asked him to buy a train ticket for him.

“But I don’t have enough money to pay both your ticket and mine,” Mark Twain said. The friend didn’t

know what to do. “Let’s do this, “ Mark Twain saying, “You can get off the train and when the conductor

comes to check the ticket you can hide under my seat.” Later, however, when the conductor comes to check

the ticket, Mark Twain gave him two tickets-----one for him and the other for his friend.

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