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【判断题】
三相绕线型异步电动机,转子电路串入的电阻越大,其启动转矩越大
A.
正确
B.
错误
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【判断题】第三类电源原则上不用作一级负荷的电源。
A.
正确
B.
错误
【单选题】心动周期中,哪一期左室压力最高
A.
心房收缩期末
B.
等容收缩期末
C.
快速射血期末
D.
减慢射血期末
E.
充盈期末
【单选题】心动周期中哪一期左室压力最高()
A.
心房收缩期末
B.
等容收缩期末
C.
快速射血期末
D.
减慢射血期末
【单选题】在Word下“文件”选项卡中,“最近所用文件”选项下显示文件名的个数最多可设置为
A.
10个
B.
20个
C.
25个
D.
50个
【单选题】Five minutes earlier ____ we could have finished the task. [     ]
A.
or
B.
but
C.
so
D.
and
【单选题】Five minutes earlier, ______ we could have caught the last train.
A.
and
B.
but
C.
or
D.
so
【单选题】Five minutes earlier, ______ we wouldn't have missed the last bus.
A.
or
B.
and
C.
but
D.
so
【单选题】Had I got there five minutes earlier, I could () her.
A.
meet
B.
meeting
C.
have met
D.
to meet
【单选题】Five minutes earlier, I the flight.
A.
have caught
B.
had caught
C.
could have caught
D.
were to catch
【简答题】If you ______ (arrive)five minutes earlier.you could have caught the bus.
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