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【单选题】
下面五个电磁辐射区域波长最短者A.
红外区
B.
X射线区
C.
无线电波
D.
可见光区
E.
紫外光区
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举一反三
【单选题】When the two students dropped out, no one took much notice because______.
A.
they had long lost heart in class performance
B.
they were absent from class too often
C.
they didn't get on well with other students
D.
they were so much cut off from the rest of the class
【简答题】Paragraph 8______.
【简答题】教学系统设计的理论基础不包括（ ）A. 学习理论B. 教学理论C. 系统理论D. 媒体理论
【简答题】a long comfortable seat for two or more people to sit on
【单选题】—Could you tell me ? —About two hours.
A.
how long it takes to fly to Guilin
B.
how long it took to fly to Guilin
C.
how long does it take to fly to Guilin
D.
how long did it take to fly to Guilin
【简答题】It took two long sittings to record all the texts.
【单选题】The pencil is _______ that one.
A.
as two time as long
B.
as long two times as
C.
two times as long as
D.
long as two times than
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