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1当0<x<2时,x 2-2x+a<0恒成立,则实数a的取值范围是( )。
A:(-∞,1]
B:(-∞,0]
C:(-∞,0)
D:(0,+∞)
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2不等式ln 2x+lnx<0的解集是( )。
A:(e-1,1)
B:(1,e)
C:(0,1)
D:(0,e-1)
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3如果不等式5-x>7|x+1|和不等式ax 2+bx-2>0有相同的解集,则实数a,b的值为( )。
A:a=-1,b=2
B:a=-4,b=-9
C:a=-1,b=9
D:a=-8,b=-10
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4方程 X 2-PX+6=0 的解集为M,方程X 2+6X-q=0 的解集为N,且M∩N={2},那么P+q=( )。
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5a<0,关于x的不等式x 2-3ax+2a 2<0的解集为( )。
A:(a,2a)
B:(2a,a)
C:(-a,-2a)
D:(-2a,-a)
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6Water, which seems so simple and common, is ______ makes life possible.
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7Studying English lies not so much in ________we learn by heart as in ________ we really understand.
A:that; what
B:what; what
C:that; that
D:what; that
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8Jane and I have never met but from Jack told me she is lovely and fun to be with.
A:which
B:what
C:whose
D:whom
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9After ______ seemed to be hours of waiting in line, I finally got my turn to take the oral exam.
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10_____ some teenagers don"t realize is _______ difficult life can be after they getaddicted to drugs.
A:What; what a
B:What; how
C:That; how
D:That; what
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