配制一定物质的量浓度的NaOH溶液时，造成所配溶液浓度偏高的原因是（    ）

A．向容量瓶中转移溶液时，容量瓶事先用蒸馏水洗涤过

B．称量时NaOH已经潮解

C．定容时俯视容量瓶的标线

D．摇匀后发现液面低于标线，滴加蒸馏水至标线再摇匀

Some sea water came into the wheel house during the voyage due to（）the window thereof.

A.not close

B.not closing

C.we didn't close

D.not to be closed