在水力掘进中,人字水枪的间距,较井筒直径小()左右即可。
A.1米
B.1.3米
C.1.5米
参考答案:B
.____on his novel, the author decided to adapt it into a play.
A.Basing
B.Based
C.To base
D.Being based
遇有电气设备着火时,应立即将有关设备的(),然后()。