10.【单选题】马克思主义认识论认为，人类认识发展的动力在于：（）

I＇ll assign you ____ seat to give you more room to stretch your legs out.

Are passengers allowed to store some of their luggage inside the aircraft?

Which part of the aircraft is not accessible to the passengers?

The ____ is the area where food of the passengers is prepared.

When are the passengers required to wear a seat belt?

What is the part of the aircraft where passengers are seated called?

It took me a while to ____ this word in this thick book.

____ passengers do not have to go through customs.

It took him a full day to ____ those bags.

The captain needs to be ____ of this.