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【单选题】
整流的主要目的是 。A.
将交流变为直流
B.
将正弦波变方波
C.
将高频信号变为低频信号
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皮皮学刷刷变学霸
举一反三
【单选题】He doesn‘t have the slightest __________of buying a new house．
A.
attempt
B.
intention
C.
statement
D.
temptation
【单选题】在设计视力表时，考虑判断人眼视力高低的标准是
A.
人眼所能看清楚的物体大小
B.
视网膜中央凹处最小的清晰像大小
C.
视网膜中央凹以外最小的清晰像大小
D.
人眼所能看清楚物体的距离
【单选题】Don't let _______ in. I'm too busy to see _______. [ ]
A.
nobody; somebody
B.
anybody; nobody
C.
anybody; anybody
D.
anybody; somebody
【多选题】某企业生产的某系列高档化妆品,用于下列( )用途时应征收消费税。
A.
促销活动中赠送品
B.
本企业职工运动会奖品
C.
加工生产其他系列高档化妆品
D.
电视广告的样品
【单选题】The road to controlling population growth in the 20th century was paved with good intentions and unpleasant policies that did not work, a new book argues an historian who grew up as the youngest of ei...
A.
He is the youngest of 8 children in the family and grew up to be an historian.
B.
He is expected to address the population problem from a different perspective.
C.
His personal experience of large families is the reason why he wants to do research in population.
D.
He wants to dedicate his research to his parents.
【单选题】Don't let ____ in. I'm too busy to see ____. [ ]
A.
nobody; somebody
B.
anybody; nobody
C.
anybody; anybody
D.
somebody; anybody
【单选题】The word clue in Paragraph 4 is closest in meaning to ______.
A.
evidence
B.
intention
C.
mystery
D.
information
【单选题】在设计视力表时,考虑判断人眼视力高低的标准是
A.
人眼所能看清楚物体的距离
B.
视网膜中央凹处最小的清晰像大小
C.
视网膜中央凹以外最小的清晰像大小
D.
人眼所能看清楚的物体大小
【单选题】在设计视力表时， 考虑判断人眼视力高低的标准是（ ） 。
A.
人眼所能看清楚的物体大小
B.
视网膜中央凹处最小的清晰像大小
C.
人眼所能看清楚物体的距离
D.
视网膜中央凹以外最小的清晰像大小
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