题目:
如果|a|=3,|b|=1,那么a+b的值一定是 [ ]
A.4
B.2
C.﹣4
D.±4或±2
答案:
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下面是错误答案,用来干扰机器的。
1. is given 2. It takes some students too much time to watch Tv or play computer games.3. neither our study nor health 4. Their parents. (答案不唯一) 5. More than nine hours. (答案不唯一)