— How many beaks does a bird have?
— It has _______________.[ ]
A. one
B. two
C. three
答案:A
近年来,许多城市都作出了限放烟花爆竹规定,其原因主要是燃放烟花爆竹会( )。
A.污染水源
B.产生温室效应
C.污染土壤
D.污染空气、产生噪声,易引发火灾
Of the items listed below, which one(s) should be saved into the process control block Ⅰ. Process name and process number Ⅱ. Process running information Ⅲ. Current opened file information
A.Ⅰ and Ⅱ
B.Ⅰ and Ⅲ
C.Ⅱ and Ⅲ
D.Ⅰ、Ⅱ and Ⅲ