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【单选题】
下列命题中正确的有()个 1x=2是x2-x-2=0的充分条件 2x≠2是x2-x-2≠0的必要条件 3|x|=|y|是x=y的必要条件 4x=1且y=2是|x-1|+(y-2)2=0的充要条件A.
1
B.
2
C.
3
D.
4
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举一反三
【简答题】根据霍兰德职业兴趣类型、特点进行连线:
【简答题】Global warming is when the earth heats up，the temperature rises.It happens when greenhouse gases—carbon dioxide，water vapor，nitrous oxide(二氧化氮)，and methane(沼气) trap heat and light from the sun in the ...
【单选题】Minification happens when
A.
A small image is mapped to a large screen area
B.
A large image is mapped to a small screen area
C.
Texture image has low resolution
D.
Texture image has high resolution
【判断题】Spastic paralysis happens when central neurotransmitter is blocked, while flaccid paralysis happens when neuromuscular junction is damaged.
A.
正确
B.
错误
【多选题】怎么样迅速找到所需书籍
A.
通过图书检索系统提示快速检索信息
B.
记录下分类号和馆藏地
C.
查看书架侧面分类标识，根据索书号找书
D.
询问图书馆工作老师，找到书籍的馆藏地，再仔细寻找
【简答题】下列各项现金流出，属于企业现金流量表中投资活动产生的现金流量的有（ ）。
【单选题】Magnification happens when
A.
A small image is mapped to a large screen area
B.
A large image is mapped to a small screen area
C.
Texture image has low resolution
D.
Texture image has high resolution
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