A.0 B.2 C.-1 D.1C

Freeti2019-12-17  16

问题

选项 A.0B.2C.-1D.1

答案C

解析[img]/upload/tiku/459/6542707_1.png[/img][img]/upload/tiku/459/6542707_1_1.png[/img]
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