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【单选题】
采用降压法起动的三相异步电动机起动时必须处于( )。A.
轻载或空载
B.
满载
C.
超载
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反馈参考答案：
举一反三
【单选题】4-3 下列关于生产物料消耗定额的表述正确的是( )
A.
生产物料消耗定额是为制造一定数量产品而消耗的物料
B.
生产物料消耗定额是为制造单位产品而消耗的物料
C.
生产物料消耗定额是为制造单位产品而消耗的物料所占用资金的金额
D.
生产物流消耗定额是为制造单位产品而消耗的物料数量标准
【单选题】There must be many people ______ for the train at the train station because of the snow.
A.
wait
B.
waited
C.
to wait
D.
waiting
【单选题】I ______ the train but I overslept that morning.
A.
could catch
B.
might catch
C.
must have caught
D.
could have caught
【简答题】典型无线传感器网络传输层协议-PSFQ为了保证网络的可靠性,采用了三种机制来确保数据的可靠传输,分别描述一下? {
【单选题】We must run ______ we will miss the first train. [ ]
A.
so
B.
though
C.
otherwise
D.
but
【单选题】We must ______ early in the morning so as to catch the first train.
A.
set up
B.
set out
C.
set about
D.
set aside
【单选题】My newly-purchased magazine is nowhere to be found. ____ I left it on the train? [ ]
A.
Must
B.
Should
C.
Would
D.
Could
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