WHO在“功能与功能缺陷国际分类”中将功能缺陷分为哪几个层面？

A. She wants to study again tomorrow.
B. She is unhappy to work so long.
C. She considers half a day’s work is a day’s work.
D. She is willing to stop working.

A. The noise in the room.
B. The heat inside.
C. The long working hours.
D. The crowded room.