A、<img src="http://s3.qsxt.info/exams/201906/b84ddf5b-178c-4e7a-b16e-9c3a1589055e.png"/>
B、<img src="http://s3.qsxt.info/exams/201906/3b7a9c3c-9d75-4b91-8449-9c33d923d552.png"/>
C、<img src="http://s3.qsxt.info/exams/201906/7db03361-4222-4894-bd20-601e0baf288d.png"/>
D、<img src="http://s3.qsxt.info/exams/201906/2d02085e-3f4b-4c7c-b995-ab76b45f9ba2.png"/>