在合同履行过程中，监理人收到承包人变更报价书后( )天内，根据变更估价原则，商定或确定变更价格。

A．5
B．7
C．10
D．14

To launch a liferaft by hand you should（）.

A.cut the casing bands，throw the liferaft over the side，and it will then inflate

B.detach the operating cord，throw the raft over the side，and it will then inflate

C.cut the casing bands，throw the raft over the side，and pull the operating cord

D.throw the liferaft over the side and pull the operating cord