1. [单选题]船舶在海上航行遇到风浪之后产生谐摇，为减轻横摇可采取的措施包括( )。Ⅰ.调整船的横摇周期;
A. Ⅱ.调整吃水差;
B. Ⅲ，调整航速;
C. Ⅳ.调整航向。
D. Ⅰ～Ⅲ
E. Ⅰ、Ⅱ、Ⅳ
F. Ⅱ～Ⅳ
G. Ⅰ、Ⅲ、Ⅳ
2. [单选题]有一台额定电流为10A的三相异步电动机.在额定负载下运行，如果用钳型电流表分别钳住一根相线、两根相线和三根相线，钳型电流表的读数分别为( )。
A. 10/20/30
B. 10/10/0
C. 10/20/10
D. 10/10/10
3. [单选题]As a duty engineer, as soon as your hear the fire emergency signal, you should ensure that the
A. ring buoys are thrown overboard
B. engines are stopped
C. fire pumps are started
D. life preservers have been issued to everyone
