为减小漏气损失,在汽轮机的相应部位设置了汽封,汽封分为:()汽封、()汽封、()汽封。
参考答案:轴端、隔板、通流部分
轮船发出六声短笛,这不表示()
A.倒退
B.避让
C.转弯
D.遇险
It___ how long the shock that explosions hit London transport system will stay in people's hearts.
A.abandons
B.considers
C.matters.
D.minds