24.【单选题】唯物主义和唯心主义这两个专门的哲学术语有着特定的含义和确定的标准，不能随意乱用，也不能另立标准，否则会造成混乱。这里所说的特定含义和确定标准是指（）。

How would you like me to ____ you for my error?

He has refused to offer us any help. Did you know about that?
- Yes, but I＇d like to ____ him to change his mind.

There are many reasons for a flight ____.

There will be some air ____ in 10 minutes. Please return to your seat and fasten the seat belt.

Passengers are required to be at the airport 2 hours ____ departure.

Because of this, the economy is ____ to get worse.

The pilot was seriously injured and the ____ would take over.

A ____ of 20,000 people came to the concert.

What＇s the ____ rate between US dollar and Pound?

The customs officer caught a ____ dealer at the airport.