A、<img src="http://s3.qsxt.info/exams/201906/6a4dd224-8e09-4f0d-a58f-46c6bd661cb3.png"/>
B、<img src="http://s3.qsxt.info/exams/201906/aa002067-80f1-41b2-96f6-de0750512fe6.png"/>
C、<img src="http://s3.qsxt.info/exams/201906/49dc46ca-2a2d-461a-bcee-7133a5f226f1.png"/>
D、<img src="http://s3.qsxt.info/exams/201906/0eaef022-8624-4386-8c9b-62d2885add7d.png"/>