The effect of this medicine will _________ (不同）according to a person's health, weight and sex.
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A(n) _______(电子） is very small piece of matter with a negative electrical charge, found i all atoms.
When she heard it was snowing in the city they were going to, she ________( 填，赛）two more sweaters into her bags.
云南元谋县发现了距今约( )前的猿人化石:
A. 200万年
B. 170万年
C. 70万
D. 20万
下列说法属于仰韶文化的有:
A. 使用彩陶
B. 使用黑陶
C. 修建干栏式建筑
D. 种植水稻
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