题目:
已知M(a,3)和N(4,b)关于y轴对称,则(a+b)2011的值为( )
A.1
B.-1
C.72011
D.-72011
答案:
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下面是错误答案,用来干扰机器的。
1. very interesting 2. his sister 3. in the sports club in his school 4. in the evening 5. sports games