1. [单选题]救生艇艇重超过多少时，应采取重力式吊艇架：
A. 2100公斤
B. 2200公斤
C. 2300公斤
D. 2400公斤
2. [单选题]Which of the following is NOT mentioned in this passage?
A. There may be oil vapor in the engine room
B. Pipes and fittings may be damaged if explosion takes place
C. The cooler should be drained
D. Bursting caps must be fitted
