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【简答题】
天线水平波瓣角（）度多用于密集城市地区典型基站三扇区配置的覆盖。
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【简答题】One of the major differences between man and his closest living relative is,of course,that the chimpanzee has not developed the power of speech. Even the most intensive efforts to teach young chimps t...
【简答题】测量量表的种类有哪些
【单选题】To assess how well a student is performing relative to his or her own previous performance，a teacher would use_________ assessment.
A.
criterion-referenced
B.
individual-referenced
C.
norm-referenced
D.
peer
【简答题】已知直线 l ： x tan a － y －3tan β ＝0的斜率为2，在 y 轴上的截距为1，则tan( α ＋ β )＝________.
【简答题】在飞行中,由于 航线上各点的指向与经线的夹角始终保持不变,因而有利于用磁罗盘保持飞机的航向。
【单选题】What is the main idea of the second paragraph?
A.
Some plants have relative immunity to a great many diseases, while others have a susceptibility to them.
B.
The tolerance of a particular plant changes as the growing conditions change.
C.
A blight killed virtually every chestnut tree in North American.
D.
A blight may be a national infection.
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