下列选项中属于水质保护措施的有()
A、污染防治措施
B、水质管理措施
C、除尘净化措施
D、设置声屏障
参考答案:A, B
-Did Linda see the traffic accident?
-No, no sooner ________ than it happened.[ ]
A.had she gone
B.she had gone
C.has she gone
D.she has gone
大额医疗保险怎么报销?