Read and number. (给下列句子排序)   

(    ) I usually get up at 6:40. When do you go to school?

(    ) Me, too. When do you play sports?

(    ) When do you get up?

(    ) At 3:00 in the afternoon. 

(    ) At 7:30. How about you?

(    ) At 6:30. And you?

装有易燃气体的车辆，距牵引的内燃机车最少隔离（）辆。

A.1

B.2

C.3

D.4