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【单选题】
已知功率放大器原工作在临界状态,当改变电源电压时,管子发热严重,说明管子进入了 状态:A.
欠压
B.
临界
C.
过压
D.
以上都不对
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举一反三
【单选题】The writer believed he had passed the exam ______.
A.
as the result of his hard work
B.
as the result of his professor's showing mercy to him
C.
mainly due to his tireless revision in the night before the exam
D.
out of his expectation
【单选题】Mary said that Hemingway was her______writer and that she had read nearly all of his novels.
A.
famous
B.
popular
C.
common
D.
favorite
【单选题】The writer had plenty of time to spare as his train ______.
A.
was leaving later than scheduled
B.
was not leaving for another hour
C.
was not scheduled to leave
D.
was delayed for some reason
【单选题】The writer and his friend______.
A.
had never been to that bar before
B.
did not know if they had come to the right place
C.
asked somebody the name of the bar
D.
had little difficulty in finding the bar
【单选题】When the writer first came to the capital______.
A.
he had been very reluctant to leave his mother
B.
his mother had not wanted him to leave home
C.
he had made no preparations for his journey south
D.
he had sent his possessions on ahead in a trunk
【单选题】That day the writer found ______.
A.
he had lost his wallet
B.
he had left his wallet at home
C.
his wallet was stolen by a thief
D.
his wallet was lying under the table
【单选题】The writer wanted to resign because ______.
A.
he had serious trouble with his boss
B.
he got underpaid at his job for the Globe
C.
he wanted to be engaged in the new media industry
D.
he had found a better paid job in a publishing house
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