井巷中采用钢丝绳牵引带式输送机或钢丝绳芯带式输送机运送人员时,输送机的带宽不得小于()m。
参考答案:0.8
有一个正方体水箱,从里面量每边长5dm,如果一满箱水倒入一个长8dm、宽25cm的长方体水池内,水深多少分米?
As we all know, smoking ___________ people’s health.
A.is harmful to
B.do harm fo
C.does harmful to
D.harm