人在同样的温度时，水带走体温的速度是空气的（）倍。

"根据标准航海通信用语，关于""May"", ""Might"", ""Should"" and ""Could"".以下说法正确的是

"根据标准航海通信用语,下列说法错误的是 （） ？

"Which of the following is true?()

"When rudder angles e.g. in wheel orders are given, for example “15”,say:（）

"If the true course of a ship is 150°, we will say （）

"When a message is not properly heard, say: （）

"If any part of the message are considered sufficiently important to need safeguarding, say: ""（）"" - followed by the corresponding part of the message.

"When a mistake is made in a message, say:""（）"" - followed by the word:""Correction"" plus the corrected part of the message.

"When it is accepted to remain on the VHF channel / frequency indicated, say: （）

"When it is advisable to remain on a VHF channel / frequency say: （）