28. 下列何者為表示「呼叫不知名之收信台（船），或一般呼叫」的程序信號？

8. You load a liquefied gas which can react dangerously with water so moisture control of cargo tank is required before loading. What dew point of the dry air you should purge into cargo tank to remove moisture prior to loading as per IGC Code (International Gas Carrier Code)? (A) Air which has a dew point of -45 degrees Celsius or below at atmospheric pressure. (B) Air which has a dew point of -40 degrees Celsius or below at atmospheric pressure. (C) Air which has a dew point of -35 degrees Celsius or below at atmospheric pressure. (D) Air which has a dew point of -30 degrees Celsius or below at atmospheric pressure.

28. 下列何者為表示「呼叫不知名之收信台（船），或一般呼叫」的程序信號？

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