A、<img src="http://s3.qsxt.info/exams/201906/6b87741d-b943-4ed4-9013-b520767eaa51.png"/>
B、<img src="http://s3.qsxt.info/exams/201906/10748d1a-14dd-4234-aa9a-c8641afa0b79.png"/>
C、<img src="http://s3.qsxt.info/exams/201906/2afee7a7-bef4-4707-b422-1c36d44ed065.png"/>
D、<img src="http://s3.qsxt.info/exams/201906/573d642a-158f-482c-8e64-808617208e02.png"/>