1. [单选题]水润滑艉轴常采用( )来防腐。
A. 环氧树脂
B. 合成橡胶
C. 酚醛塑料
D. 尼龙
2. [单选题]According to the passage, we can infer that the pole piece diameter must be tooth height.
A. as same as
B. much less than
C. much more than
D. not confirmed
3. [单选题]在救生艇上的淡水是按额定乘员每人配备：
A. 1.5升
B. 2.5升
C. 3升
D. 1升
4. [单选题]弃船人员登上艇筏后，哪些人员可视情况给予适当的淡水?
A. 船长
B. 干部船员
C. 病患者(disease)
5. [单选题]修船前备件的准备有______。Ⅰ、备件订货困难，提前向厂方提出Ⅱ、备好自修项目的备件Ⅲ、换新时由厂方备妥备件
A. Ⅰ+Ⅱ
B. Ⅰ+Ⅲ
C. Ⅱ+Ⅲ
D. Ⅰ+Ⅱ+Ⅲ
