单项选择题 A sling psychrometer is used to measure（）.

单项选择题 A situation has occurred where it becomes necessary for you to be towed. What action should be taken to prevent your vessel from yawing?（）

单项选择题 Should the Vessel become an actual，constructive or compromised（）before delivery the deposit together with interest earned shall be released immediately to the Buyers whereafter this Agreement shall be null and void.