GB7588—2003《电梯制造与安装安全规范》规定,在机房和滑轮间内必须采用防护罩壳以防止直接触电。所用外壳防护等级最低为IP2错误。IP2错误中,“2”表示防止人用手指接近危险部件,防止直径不小于12.5mm的固体异物进入外壳内;“错误”表示无要求。()
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按GB7588—2003《电梯制造与安装安全规范》附录M进行曳引力计算时,需要计算当量摩擦系数f。f与摩擦系数μ成正比关系,μ恒等于0.1。()
The gardener is taking care of the place, no one _____ there at present.
A:living
B:lives
C:lived
D:to live
Quite often I've gone to a man who didn't tell me _____ Adam.
A:from
B:with
C:to
D:of