单项选择题
A、75% B、90% C、95% D、99%
A、≤35℃ B、≤40℃ C、≤45℃ D、≤48℃
A、0.20~0.45MPa B、0.25~0.40MPa C、0.25~0.45MPa D、0.25~0.50MPa