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【单选题】
The Scarlet Letter is written byA.
Mark Twain.
B.
Washington Irving.
C.
Nathaniel Hawthorne.
D.
Theodore Dreiser.
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皮皮学刷刷变学霸
举一反三
【多选题】假设只是为解决单相异步电动机不能自行启动的问题,下列办法可行的是———。
A.
启动绕组上串入一定大小的电容
B.
启动绕组上串入合适大小的电阻
C.
启动绕组采用直流励磁
D.
启动时,借外力拨动一下转子
【单选题】—I came to your office yesterday morning, but nobody was in. —Oh, we ________ a meeting in the meeting room. [ ]
A.
have had
B.
had
C.
were having
D.
had had
【单选题】If he takes on this work, he will have no choice but ______ an even greater challenge.
A.
meets
B.
meeting
C.
meet
D.
to meet