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【单选题】
高压变压器次级线圈的工作特点是A.
电流大、电压低、绝缘要求不高
B.
电流大、电压高、绝缘要求不高
C.
电流小、电压高、绝缘要求高
D.
电流小、电压低、绝缘要求不高
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【简答题】研究样品表面形貌特征的的主要研究方法:————;————;————
【单选题】— How time flies! — Yeah. It seems like yesterday that I graduated from college. I can’t believe I for 10 years!
A.
had worked
B.
am working
C.
worked
D.
have been working
【单选题】We met Mary and her husband at a party two months ago. ______ we've had no further communication.
A.
Thereof
B.
Thereby
C.
Thereafter
D.
Thereabouts
【简答题】阅读理解。 Mrs Green is going to give her daughter, Mary, a birthday party. Mary will be ten years old. A lot of her friends are coming to the party. Twenty of them are girls. Mrs Green is getting ready fo...
【单选题】Mary is the love of my life. I still remember that I met her ____ the airport ____ a snowy evening.
A.
in; at
B.
at; on
C.
on; by
D.
to; before
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