海豚生在海里,但海豚不是鱼,那么下列论述正确的是:
A.鱼不是生活在海里
B.生活在海里的不一定是鱼
C.不是海豚的动物是鱼
D.不是海豚的动物都不是鱼
参考答案:B
HDLC协议是一种(),采用()标志作为帧定界符。
采用()标志作为帧定界符。
A.10000001
B.01111110
C.101O1010
D.10101011
The beautiful mountain village we spent our holiday last year is located in is now part of Guangxi.
A.which; where
B.where; what
C.that; what
D.when; which