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【单选题】
我国幼儿园教师实行聘任制开始于 ( ) 。
A.
1994 年
B.
1995年
C.
1996 年
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举一反三
【单选题】The person who is _______ of the factory _______ ill since last week.
A.
in charge; has been
B.
in the charge; fallen
C.
taking charge; was
D.
in charge; fell
【单选题】离心泵的工作原理是利用叶轮高速旋转产生的( )
A.
重力
B.
离心力
C.
拉力
D.
向心力
【单选题】You should be careful of such a person flatters you in your presence and speaks ill of you in behind.
A.
who
B.
that
C.
as
D.
which
【单选题】轴流泵的工作原理是依靠叶轮旋转产生()来抽水的。
A.
向心力
B.
离心力
C.
推力
D.
旋转力
【简答题】设 其中 可导,且 ,则
【单选题】The person ___ of the factory has ___ ill since last week.
A.
in charge, been
B.
in the charge, fallen
C.
taking charge, fallen
D.
in charge, fell
【单选题】空气冷凝管适合冷却沸点为()的液体
A.
沸点大于140 oC
B.
沸点在100 oC以下
C.
沸点在50 oC以下
D.
以上都不是
【单选题】离心泵的工作原理是利用叶轮高速旋转产生的( )
A.
向心力
B.
重力
C.
离心力
D.
拉力
【单选题】The person who is _______ of the factory _______ ill since last week.
A.
in charge; has been
B.
in the charge; has fallen
C.
taking charge; was
D.
in charge; fell
【判断题】尺寸越大,渲染时间越长,图像质量越低。
A.
正确
B.
错误
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