高压灭菌时为了保证灭菌效果首要注意的是()
A、直接升至所需压力即可
B、排除锅内全部冷气后再升压
C、稍排冷气即可
D、排出锅内1/2冷气就行
E、排出锅内2/3冷气
参考答案:B
The window of our room can give us a good view of the street, in which case we witnessed the accident as if we were at the _____. [ ]
A. sight
B. scene
C. view
D. scenery
保险闸