MGB1420型磨床控制回路检修时,自动循环磨削加工时不能自动停机,可能是行程开关()接触不良。
A、SQ1
B、SQ2
C、SQ3
D、SQ4
参考答案:C
Though smoking is not allowed in the public places, many people are still in _______ habit of smoking in the train or bus in _______ public.
A.the;the
B./;/
C.the;a
D.the;/
()不允许进入重要空白凭证库。
A.管辖行运营部经理
B.管库人员
C.符合手续的检查人员
D.符合手续的设施维护人员