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问题 填空题

煤气设备及管道检修化验进人标准（）和（）。

答案

参考答案：CO含量小于24PPm；O2含量大于18%

选择题
Read and match. 读一读，把英文和汉语匹配起来。 
( ) 1．起床      
( ) 2．读书      
( ) 3．看电视    
( ) 4．呆在家里  
( ) 5．电视节目 		A．read a book     
B．stay at home                                               
C．TV show         
D．get up          
E．watch TV      
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选择题
Mary did _______ her sister in the maths exam.

A. as worse as
B. more careful than
C. as good as
D. much more carelessly than
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