[单选题]每艘救生艇应配备有效的雷达反射器：

正确答案 ：A

1具

[单选题]Diesel engines driving alternators operating in parallel must maintain a set frequency regardless of load changes. The governor characteristic used to accomplish this is known as _______.

正确答案 ：C

compensation

[单选题]下列叙述中错误的是()。

正确答案 ：D

锅炉安全阀的开启和关闭压力可经船员调整

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