电气设备的外壳同接地母线或局部接地极连接时,连接导线使用镀锌铁线截面应不小于()mm2。
A.25
B.50
C.10
D.100
参考答案:B
磨矿机的充填率通常为()
A、20—30%
B、30—40%
C、40—45%
D、40—50%
Cindy and Tom like singing and dancing, but _____ students in the class go in for sports.
A.others
B.the others
C.the other
D.another