A、<img src="http://s3.qsxt.info/exams/201906/40f5b771-67e9-449b-a47f-d0c4a6f3095f.png"/>
B、<img src="http://s3.qsxt.info/exams/201906/c808d3bb-48f3-409a-8b9e-777f2377366d.png"/>
C、<img src="http://s3.qsxt.info/exams/201906/5d1fef5b-a785-4778-b61c-8d2cf5c83aa8.png"/>
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