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【单选题】
P 型半导体的空穴数目多于自由电子,整体而言,P型半导体呈现的电性为( ) 。A.
负电性
B.
正电性
C.
电中性
D.
无法确定
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反馈参考答案：
举一反三
【单选题】The customer wants to buy some fax machines for use only in the company's branch offices.
A.
True
B.
False
【单选题】以下哪项能帮助老年人提高沟通能力呢( )
A.
构音障碍的应对
B.
视力降低、眼镜;重听、助听器的应对
C.
促进唾液分泌，唾腺按摩、口唇运动
D.
努力与老年人沟通交流
E.
以上均正确
【简答题】A．Some forecasting machines do not work well in hot weather. B．The weather patterns are more changeable in the autumn. C．Experts spend less time studying autumn. D．The National Weather Service misplac...
【简答题】英译汉。 Robot can play chess. ___________________________________________
【单选题】The factory ________ in the newspaper that they had some old machines for sale.
A.
selected
B.
solved
C.
designed
D.
advertised
【单选题】Machines will do ______ people.
A.
most of the work instead of
B.
some of the work instead of
C.
as much work as
D.
as little work as
相关题目：
【单选题】以下哪项能帮助老年人提高沟通能力呢( )
A.
构音障碍的应对
B.
视力降低、眼镜;重听、助听器的应对
C.
促进唾液分泌，唾腺按摩、口唇运动
D.
努力与老年人沟通交流
E.
以上均正确
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