题目内容

Thisillustrationshowsthecorrectmethodofsecuringa（）.

A. man-rope
B. frappingline
C. seapainter
D. lifeline

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Whichofthefollowingelectricmotorswouldbethesafestandmostreliabletouseonthemaindeckofavesselinfoulweatherconditions?（）

A. Sealedmotors
B. Dripproofmotors
C. Enclosedmotors
D. Watertightmotors

Toturnoveraliferaftthatisfloatingupsidedown，youshouldpullonthe（）.

A. canopy
B. manropes
C. seapainter
D. rightinglines

Adirectcurrentpassingthroughawirecoiledaroundasoftironcoreisthedescriptionofasimple（）.

A. magneticshield
B. electromagnet
C. piezoelectricdevice
D. electromagneticdomain

现代礼仪具有以下特征（）

A. 国际性
B. 民族性
C. 传统性
D. 时代性