皮皮学，免费搜题
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【单选题】
氧乙炔焰的温度与混合气体的成分有关,( ),火焰温度增高。A.
随着氧气比例的提高
B.
随着乙块比例的提高
C.
随着氧气比例的降低
D.
随着混合气比例的降低
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举一反三
【单选题】I don’t think Jack is a man to be _____ when we are in trouble and need his help.
A.
hoped for
B.
related to
C.
expected from
D.
relied on
【单选题】---Mary! If only we had less homework today! ---_____We all need more relaxation.
A.
I don’t think so
B.
Thanks for your advice.
C.
I’m sorry to hear that.
D.
I couldn’t agree more.
【简答题】I think we need to see an investment ________ before we make an expensive mistake. A) guide B) entrepreneur C) consultant D) assessor
【简答题】所谓能耗制动,就是在电动机脱离三相交流电源后,在电动机定子绕组上立即加一个( ),利用转子感应电流与静止磁场的相互作用产生制动转矩以达到制动的目的
【单选题】I don't think Jack is a man to be ____ when we are in trouble and need his help. [ ]
A.
related to
B.
hoped for
C.
excepted from
D.
relied on
【单选题】—This is a piece of hard work. I'm afraid ten people aren't enough. —You are right. I think we need _________. [ ]
A.
every four
B.
only four
C.
four more
D.
four less
【单选题】--- ________ bread do we need for the party? --- I think we need about 20 loaves.
A.
How many
B.
What
C.
How much
D.
Which
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