关于肺动脉瓣狭窄。哪项不是肺动脉瓣狭窄的X线表现 A．肺纹减少 B．肺动脉总干凸出

We’re doing        job        we all feel proud of ourselves.

A．such meaningful; and

B．such meaningful; that

C．such a meaningful; and

D．such a meaningful; that

人在进食吞咽时，食物一般不会误入气管的原因是（　　）

A．舌的阻挡

B．气管的阻挡

C．会厌软骨的阻挡

D．气管软骨的收缩

醛固酮对抗剂（）

A.呋塞米

B.螺内酯

C.甘露醇

D.氢氯噻嗪

E.氨苯蝶啶

水资源管理的方法和手段是什么？

The total berth time for a vessel can be reduced through a reduction（）.

A.of working gangs

B.of idle time

C.in productivity of the working shifts

D.of working hours each working day