矿井发生突水后，如果初期水量较小，可在巷道的水沟中使用浮标法测量水量。
参考答案：对
-How do the shops make money if they sell at such low prices?
-Manufacturers, it seems, are willing to bring down prices ________ big volume purchases.[ ]
A. under the name of
B. on behalf of
C. in return for
D. in preparation for
洛克
