石灰石膏法脱硫系统停用时间超过()天,需将石灰石粉仓中的石灰石粉清空,以防止积粉。
A、7
B、15
C、30
D、40
参考答案:A
Practicing Chinese Kung fu can not only______ one’s strength, but also develop one’s character.
A.bring up
B.take up
C.build up
D.pull up
0,1,64,243,( ),125,36
A.270
B.256
C.180
D.160