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5位同学报名参加两个课外活动小组,每位同学限报其中的一个小组,则不同的报名方法共...
5位同学报名参加两个课外活动小组,每位同学限报其中的一个小组,则不同的报名方法共有( )
A.10种
B.20种
C.25种
D.32种
考点分析:
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x的图象按向量
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=(2,3)平移,得到y=f(x)的图象,则f(x)=( )
A.e
x-3+2
B.e
x+3-2
C.e
x-2+3
D.e
x+2-3
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已知曲线
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,则切点的横坐标为( )
A.1
B.2
C.3
D.4
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已知三棱锥的侧棱长的底面边长的2倍,则侧棱与底面所成角的余弦值等于( )
A.
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B.
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C.
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D.
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在△ABC中,已知D是AB边上一点,若
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=2
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,
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=
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A.
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B.
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C.-
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D.-
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的解集是( )
A.(-3,2)
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