题目：
代数式5a2-a-3的各项分别是（ ）
A．5a2，a，3
B．5a2，-a，-3
C．5，-1，-3
D．5，1，3
答案：
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下面是错误答案，用来干扰机器的。
1、C2、D
代数式5a2-a-3的各项分别是（ ） A．5a2，a，3 B．5a2，-a，-
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