搜题请搜索小程序“爱下问搜题”
问题 选择题

每年5月31日为世界无烟日．吸烟有害健康，烟气中的一种有毒气体是（　　）

A．O2

B．N2

C．CO

D．CO2

答案

A、O2可以供给人体呼吸，不是有毒气体，故A不符合题意；

B、N2是大气的主要成分之一，不是有毒气体，故A不符合题意；

C、CO是烟气中的一种有毒气体，故C符合题意；

D、CO2是形成温室效应的主要气体，不是烟气中的一种有毒气体，故D不符合题意．

故选C

写作题

书面表达。

     假如你就读于一所国际学校，前不久，你们班组织了一次“My learning Experience”的主题班会，

其中的三位同学介绍如下：

Betty: I'm happy that I'm making progress. I have done much better than before.

Charlie: My result is not bad, but I still have room to improve, for example, math. I did well in

              Chinese and physics.

Anne: I spent a lot of time on science but I didn't do as well as I wanted to. It's hard to believe.

现在，请你根据三位同学的介绍完成以下总结性发言。

Boys and girls,

     I'm very happy that many of you have shared your learning experiences with the class. Betty is

(1) _________. Charlie still has room to (2)_________ his math. But Anne didn't (3)_________ in her

science. In my opinion, successful or not, it is not the most important in our lives. What we need to do

is to (4) _________.

                                                                                                                               Thank you.

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单项选择题

关于外墙面装饰抹灰工程量计算说法错误的为( )。

A．应扣除门窗洞面积

B．应扣除0.3m2以上孔洞所占的面积

C．不扣除勒脚所占的面积

D．附墙柱的侧面抹灰并入墙面工程量内计算
查看答案