在波分系统中，具有保护功能的单板有（）
A、OP
B、OPCS
C、OPMS
D、OMCP
E、SWE
参考答案：A, B, C, D, E
________ Jeremy was hurt in the match, he didn’t give up and finished in ninth place.
A．When
B．Although
C．Because
D．If
