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【单选题】
直流电动机的各种制动方法中,最节能的方法是( )A.
反接制动
B.
回馈制动
C.
能耗制动
D.
机械制动
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【简答题】We need to find a(n) ____person to give us some advice on this matter.
【单选题】在同一工作薄中,Sheet1工作表中的D3单元格要引用Sheet3工作表中F6单元格中的数据,其引用表述为()。
A.
=F6
B.
=Sheet3!F6
C.
= F6 !Sheet3
D.
=Sheet3#F6
【简答题】We need to find some companies to _______________ the contest we're going to hold because we won't be able to cover all the expenses.
【单选题】We need to find some companies to ________ the contest we’re going to hold because we won’t be able to cover all the expenses.
A.
host
B.
participate
C.
fulfill
D.
sponsor
【简答题】资本主义民主制度是与资本主义()相适应而发展起来的。
【简答题】In fact, even if producing CO2 was good for the environment, given that we're going to run out of hydrocarbons, we need to find some ______.
【单选题】We need to do some research to the answer.
A.
find out
B.
look out
C.
hand out
D.
take out
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