A、<img src="http://s3.qsxt.info/exams/201906/e389b231-a755-4c1e-8110-fbb8662d175f.png"/>
B、<img src="http://s3.qsxt.info/exams/201906/95dd21b1-cac3-41a8-91b1-78b68f6a742a.png"/>
C、<img src="http://s3.qsxt.info/exams/201906/03723e50-a156-468d-840c-37bfc81fc89c.png"/>