重力式无阀滤池,其滤料愈细,则()。
A、水耗愈小,周期制水量愈大
B、水耗愈小,周期制水量愈小
C、水耗愈大,周期制水量愈大
D、水耗愈大,周期制水量愈小
参考答案:D
—Which would you like, a glass of water or a cup of tea?
—________. I will just have a cup of coffee.
A. Both
B. Either
C. Neither
轻型井点的降水深度不宜超过()。
A.5m
B.6m
C.7m
D.8m