30. Why can fish swim in the water? Jack's answer is ________ .
A.fish can't walk on land
B. fish can- t swim on land
C. fish can-t walk in the water
D.fish has no legs or hands
第1题:
A、may not
B、can’t
C、might not
D、mayn’t
第2题:
A.Must; needn’t
B.Can; can’t
C.May; mustn’t
D.Can; mustn’t
第3题:
---- Look! The man at the gate ________ be our headmaster. He is always standing there every morning.
--- - No, it ________ be him. He is holding a meeting in the office now.
A.must, can’t B.must, mustn’t C.can’t, can’t D.can’t, mustn’t
第4题:
A: I saw Tom just now at the café
B:It ( )be him. He went to U.S.A. yesterday.
A. mustn't
B. can't
C. shouldn't
第5题:
A.CAN 2.0A,CAN 2.0C
B.CAN 2.0C
C.CAN 2.0B,CAN 2.0C
D.CAN 2.0A,CAM 2.0B
第6题:
5、传输速率为500kbit/s的CAN总线系统中,CAN_L对电源短路,那么该CAN总线的数据传输无法进行。