问题 选择题

相同数目的H2O和H2O2两种分子,含相同数目的(  )

A.氧元素

B.氢原子

C.氢分子

D.氧原子

答案

由相同数目的H2O和H2O2两种分子可知,含有相同的分子数,

又1个水分子是由2个H原子和1个O原子构成的,

1个过氧化氢分子是由2个H原子和2个O原子构成的,

则它们也含有相同数目的H原子,

故选B.

改错题

第II卷(共两部分,满分35分)

第四部分:写作(共两节.满分35分)

第一节:短文改错(共10小题;每小题1分,满分10分)

此题要求改正所给短文中的错误。对标有题号的每一行做出判断:如无错误,在该行右边横线上画一个勾(√);如有错误(每行只有一个错误),则按下列情况改正:

该行多一个词:把多余的词用斜线(\)划掉.在该行右边横线上写出该词,并也用斜线划掉。

该行缺一个词:在缺词处加一个漏字符号(/\),在该行右边横线上写出该加的词。

该行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。

注意:原行没有错的不要改。

My father and I am taking a camping trip in July                            76.             

and August. We will travel for about two months but                            77.             

will tour the United States and parts of the Canada. We                             78.             

have decided to camp because it does not spend as much                        79.             

as vacationing in hotels, but we had to plan carefully. I                             80.             

think the car what we are going to drive is very small, so                      81.             

we decide to take only one small suitcase for both of them                     82.             

and as few camping things as possibly. We will take some                      83.             

medicine with us prevent insects from hurting us, and also                     84.             

some food for picnics. I'm sure that we will have fun.                           85.     

判断题