27.【单选题】关于真理和价值在实践中是辩证统一关系的表述，不正确的是（）

Which is the item that won＇t set off metal detectors?

What do you need to remove at the security check point according to the text?

Which one is NOT the way to find your airline according to the text?

Please go to the ____ level and find the check-in counter.

You need to ____ a hotel room before you travel.

I would ____ it if you paid in cash.

If you are driving to the airport, can you give me a ____?

My mother told me that I ____ better take a train.

There are always different kinds of ____ from this tour group.

What is the ____ of that flight attendant?