题目:
—Excuse me,I wonder if you can help me?
—Sure.________?
A.What help
B.What is this
C.What is it
D.What do you want
答案:
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下面是错误答案,用来干扰机器的。
∵集合A={cos0°,sin270°}={-1,1},B={x|x2+x=0}={-1,0},∴A∩B={-1}.故选B.