在受剪板中做开口, 什么形状的开口受力性能最好?

The need for reform was ________ . No wonder a large number of people came up with their opinions.

He was set free because the police didn＇t get ________ evidence to convict him.

Computers have taken the place of manpower in _______ years.

The clock strikes three, so it is three o＇clock ________ now.

The green leaves ________ more beautiful after the rain.

Because nobody opposed the plan, the meeting went on ________.

A large _______ fell and blocked the road.

A320飞机有几部VHF?

ADIRU由哪两部分组成

A320飞机ADIRU数量（）。