我国《海船船员发证规则》规定,适任船员应满足以下年龄要求:女性船员小于()周岁,男性船员小于()周岁。
A.55/60
B.55/65
C.60/63
D.60/65
参考答案:D
判断语句表述是(√)否(×)正确。
( ) 1. Please jump on the train. The train is not ready.
( ) 2. Don't talk loudly. I'm going to bed.
( ) 3. Mother and I are going on a trip. We need two tickets.
( ) 4. I'm going to the train station to buy airplane tickets.
为什么要避免在液压管路附近加热?如果不能避免加热,要采取什么措施?