无阀滤池凭借()和水力方法,实现了自动运行、自动反洗和自动联琐等全自动操作。
A、吸附原理
B、虹吸原理
C、重力原理
D、紊流作用
参考答案:B
– Have you watched the popular TV play called You, Come from the Star? The main character Professor Dou in the play is so handsome.
-Really? When ______ it?
A.will you watch
B.did you watch
C.have you watched
D.do you watch
《中华人民共和国环境影响评价法》规定,规划环评文件的受理机构是( )。
A.当地规划局
B.当地人民政府
C.当地环境保护主管部门
D.规划审批机构