通过降低火场空气中氧气含量的灭火方式称为()灭火。(A)冷却  (B)窒息  (C)

题型:单项选择题

问题:

通过降低火场空气中氧气含量的灭火方式称为()灭火。

(A)冷却 

(B)窒息 

(C)稀释 

(D)乳化

考点:消防员考试第二章燃烧基础知识第二章燃烧基础知识题库
题型:单项选择题
给下列的过去分词选择相应的原形。
( ) 1. did 
( ) 2. went 
( ) 3. saw 
( ) 4. broke
A. see 
B. do 
C. go 
D. break                                                                                 
题型:单项选择题

阅读理解。

     Guo Liqin, 24, works as a primary school teacher in a distant area in Yunnan Province. The Internet

offers him the latest news and entertainment from the outside world. And many people like him also

depends on the online libraries for the free literature (文学) reading.    

     A survey in China last year found the online literature is the biggest growth area of Internet entertainment.

     Reading for free is also popular in other countries. See what solutions other countries are taking.

     Public Libraries

     In countries such as Germany, Canada, and the UK, governments pay the authors to have their books in

public libraries.

     The pay is different from country to country. Some pay according to how many times a book has been

borrowed; others pay according to whether the library has bought the book or not.

     Google Books

     Google Books allow users to see some free parts before buying them.

     The author can choose to make from 20% to 100% of the book's content (内容) for free reading. But

you can see a full view of books that are out of copyright (版权).

     E-magazines

     E-magazines are usually about pop culture, and make money through advertisements. The writers are

usually paid by the numbers of words they write.

     Digital Library

     There are many free online libraries of books which are no longer in copyright.

     American and European websites offer classic (古典的) literature and non-fiction texts like dictionaries

for download in different languages.

1. Guo Liqin depends on _______ for free reading.

A. online libraries

B. city bookstores

C. school libraries

D. borrowing books

2. From the passage we know other countries are taking _______ solutions for reading for free.

A. 3

B. 4

C. 5

D. 6

3. In some countries, the authors are paid by _______ to have their books in public libraries.

A. advertisements

B. readers

C. governments

D. the word numbers

4. Google Books and Digital Library allow users to read the full books _______.

A. which are out of copyright

B. which are in copyright

C. which are about pop culture

D. which have some free parts

5. The best title of the passage is _______.

A. Enjoy Reading

B. Learn How to Read

C. The Importance of Reading

D. How to Read for Free

题型:单项选择题

按照宪法的理论,制宪主体不同于制宪机关。下列关于我国宪法的制宪主体或制宪机关的哪一表述是正确的( )

A.全国人民代表大会和地方各级人民代表大会是我国的制宪主体
B.全国人民代表大会是我国的制宪主体,全国人民代表大会常务委员会是我国的制宪机关
C.全国人民代表大会是我国的制宪机关,宪法起草委员会是它的具体工作机关
D.第一届全国人民代表大会第一次全体会议是我国的制宪机关

题型:单项选择题

写下列物质的分子式:硫化氢、二氧化硫、甲烷、二硫化碳、羰基硫

题型:单项选择题

室外消防给水采用常高压和临时高压给水系统时,管道供水压力应能保证用水总量达到最大,且水枪在任何建筑物最高处时,其充实水柱仍不小于()m。

A、5

B、7

C、10

D、15

更多题库