1. [单选题]为保证安全，救生艇、救助艇考舷梯，最好选择海上（）靠最佳。
A. 海面较平稳时
B. 风浪大时
C. 风流较大时
2. [单选题]Every liquid has a pressure at which it will vaporize and this pressure varies with temperatureThe word “which” means _____.
A. a liquid
B. a pressure
C. a temperature
D. none of the above
