将灭火干粉喷出来进行灭火的是()灭火器,它是以液体二氧化碳或氮气做动力的。A、泡沫

题型:单项选择题

问题:

将灭火干粉喷出来进行灭火的是()灭火器,它是以液体二氧化碳或氮气做动力的。

A、泡沫

B、二氧化碳

C、干粉

D、1211

考点:采油工考试初级采油地质工考试初级采油地质工考试题库
题型:单项选择题
仲元河边人行道路上进行路面翻新,准备对地面密铺正多边形彩色地砖,如果在某一个顶点处使用了三种边数互不相同 的地砖就能使得各边完全吻合,能够铺满地面.设正多边形地砖的边数分别为a,b,c,那么必有(  )
A.
1
a
+
1
b
+
1
c
=1
B.
1
a
+
1
b
=
2
c
C.
1
a
+
1
b
=
1
c
D.
1
a
+
1
b
+
1
c
=
1
2
题型:单项选择题

骨关节结核好发于______

A.负重大的部位

B.活动多、易遭受慢性或积累性劳损的部位

C.肌肉附着少的部位

D.易受急性外伤的部位

题型:单项选择题

阅读理解

     All over the world people enjoy sports; sports help to keep people healthy and happy, and to live

longer.

     Many people like to watch others play games. They buy tickets or turn on their TVs to watch the

games. Often they get very excited when "their" player or team wins.

     Some sports are so interesting that people everywhere go in for them. Football, for example, has

spread around the world. Swimming is popular in all countries near the sea or in those with many rivers.

What fun it is to jump into a pool or lake, whether in China, Egypt or Italy! And think of people in cold

countries. Think how many love to skate or ski (滑雪) in Japan, Norway or Canada.

      Some sports or games go back thousands of years, like running or jumping. Chinese wushu, for

example, has a very long history. But basketball and volleyball are rather new. Neither one is a hundred

years old yet. People are inventing new sports or games all the time. Water-skiing is one of the newest in

the family of sports.

      People from different countries may not be able to understand each other, but after a game together

they often become good friends. Sports help to train(培养,训练) a person's character. One learns to

fight hard but fight fair, to win without pride and to lose with grace(胜不骄,败不馁).

1.  Why do people all over the world enjoy sports?

A. Because they are healthy.    

B. Because they are happy.

C. Because they want to live longer.    

D. All the above.

2. Why do some people get excited when they watch a game? Because________.      

  

A. their favourite team wins        

B. they win the game

C. they get the good news            

D. they can't help themselves

3. Which of the sports has a long history?

A. Water-skiing.      

B. Basketball.      

C. Volleyball.      

D. Long jump.

4. Why do people from different countries often become friends after a game together?

    Because ____.       

A. they train their character in the game    

B. they understand each other

C. they are friendly to each other    

D. they help each other

题型:单项选择题

驾驶机动车在山区道路怎样超车

A.选择较缓的下坡路段超车

B.选择任意路段超车

C.选择宽阔缓上坡路段超车

D.选择较长下坡路段超车

题型:单项选择题

絮凝剂水溶液的配制?

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