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【简答题】
设f(x)是定义在R上的增函数，且对于任意的x都有f(1－x)＋f(1＋x)＝0恒成立．如果实数m、n满足不等式组 那么m 2 ＋n 2 的取值范围是________．
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举一反三
【单选题】Believe it or not, the number of indifferent (漠不关心的) passers-by ______ eighteen, and a large number of people ______ discussing the incident on the net. [ ]
A.
add up to; is
B.
add to; is
C.
adds up to; are
D.
adds to; are
【简答题】逆变状态时()
【单选题】John Smith, a successful businessman, has a ______ car.
A.
large German white
B.
large white German
C.
white large German
D.
German large white
【简答题】The professor has a large (collect) ______ of books.
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