CMYK模式中共有()个单独的颜色通道。
A. 1
B. 2
C. 3
D. 4
Each key on the board is ________ a different type of function.
A. with
B. as
C. for
D. to
When he was in danger, nobody came to his ________.
A. help
B. assistance
C. assist
D. rescue
You need to place the carton of fries with the McDonald's name ________ the customer.
A. to face
B. facing
C. face
D. faced