下列哪些属于栓剂水性基质()
A.硬脂酸丙二醇脂
B.PEG
C.S-40
D.泊洛沙姆
E.甘油明胶
参考答案:B, C, D, E
In high pace of life, we can see a _________ flow of cars running in the streets, high ways and subways every day.
A.mild
B.rough
C.temporary
D.constant
起落架备用放通过什么控制?
A、起落架收放手柄
B、操纵台后方的备用放手柄
C、左侧仪表板下方的备用放手柄