A、<img src="http://s3.qsxt.info/exams/201906/12e8afa7-3889-4c5f-88b9-3b0541fe450f.png"/>
B、<img src="http://s3.qsxt.info/exams/201906/6c78d4fa-73be-477c-8818-a458c73b8623.png"/>
C、<img src="http://s3.qsxt.info/exams/201906/8d9c622e-40b3-4065-a051-6ab8d18e7103.png"/>
D、<img src="http://s3.qsxt.info/exams/201906/23d37fe6-26a1-49b1-a7e5-9af23aa2e010.png"/>