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【判断题】
齿轮的基圆内有渐开线。
A.
正确
B.
错误
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举一反三
【单选题】When I was at school, I _____ up very late, reading storybooks.
A.
used to stay
B.
was used to stay
C.
used to staying
D.
is used to staying
【单选题】三相交流换向器电动机的缺点之一是工作电压不能太高,一般额定电压为( )。
A.
小于250V
B.
大于250V
C.
小于500V
D.
大于500Vt
【单选题】三相交流换向器电动机的缺点之一是工作电压不能太高,一般额定电压为()。
A.
小于250v
B.
大于250v
C.
小于500v
D.
大于500v
【单选题】I you when I was at school yesterday.
A.
don’t see
B.
weren’t seeing
C.
didn’t see
【单选题】I don’t speak any French. I wish I _______ harder when I was at school.
A.
had worked
B.
worked
C.
would work
D.
work
【单选题】读秀能否支持目次检索
A.
支持
B.
不支持
【简答题】设图所示电路中所有二极管均为理想器件,试判断图中各二极管是否导通,并求各输出电压。
【单选题】My pronunciation was poor when I was at school.
A.
贫穷的
B.
不好、差
C.
少量的
【单选题】My pronunciation was poor when I was at school.
A.
少量的
B.
不好、差
C.
贫穷的
【简答题】完形填空。 The tiny snow leopard cub (雪豹仔) looked across the mountainside for its mother, waiting for her to return. She never did. The cub's mother was 1 , likely killed by a hunter in the steep mountain ...
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