皮皮学，免费搜题
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【单选题】
晶闸管的触发信号在晶闸从断态转入通态即移去触发信号,能维持通态所需要的最小阳极电流,称为( )
A.
维持电流
B.
擎住电流
C.
浪涌电流
D.
额定电流
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【单选题】To: All Marketing staff Cc: Subject: 11 am Marketing Meeting Peter phoned from the station——services to London aren't running this morning. Meeting put off to 3 pm this afternoon. Jane
A.
The 11 am meeting is postponed because Peter's train was cancelled.
B.
Peter will arrive at the 11 am meeting late because his train is delayed.
C.
The 11 am meeting is rescheduled because Peter was late and missed his train.
D.
无
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A.
正确
B.
错误
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【判断题】病历书写的内容,是医务人员可能发生的医疗服务行为信息,是临床思维的行为结果。A. 错B. 对
A.
正确
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【单选题】抗过敏药马来酸氯苯那敏属于()H1受体拮抗剂。
A.
三环类
B.
丙胺类
C.
氨基醚类
D.
乙二胺类
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【单选题】证明船舶满足了SOLAS74公约的最低标准的要求是______。
A.
船舶配备了一系列证书
B.
船舶进行了船体入级检验
C.
船舶进行了初次检验
D.
船舶进行了特别检验
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【单选题】氯苯那敏属于哪类抗过敏药
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乙二胺类
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【单选题】抗过敏药马来酸氯苯那敏属于( )H受体拮抗剂。
A.
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丙胺类
C.
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【单选题】v <- c("Hello","while loop") cnt <- 2 while (cnt < 7) { print(v) cnt=cnt + 1 } 当上面的代码被编译和执行时,它产生以下结果( )
A.
[1] "Hello"      "while loop" [1] "Hello"      "while loop" [1] "Hello"      "while loop" [1] "Hello"      "while loop" [1] "Hello"      "while loop"
B.
[1] "Hello"      "while loop" [1] "Hello"      "while loop" [1] "Hello"      "while loop" [1] "Hello"      "while loop"
C.
[1] "Hello"      "while loop"
D.
error
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【单选题】抗过敏药马来酸氯苯那敏属于()H1受体拮抗剂。
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【单选题】氯苯那敏属于哪类抗过敏药
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【单选题】v <- c("Hello","while loop") cnt <- 2 while (cnt < 7) { print(v) cnt=cnt + 1 } 当上面的代码被编译和执行时,它产生以下结果( )
A.
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C.
[1] "Hello"      "while loop"
D.
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