在我们身边有着各种各样的物态变化，下列物态变化中吸热的是[ ]
A.
B.
C.
D.
答案：A
The teacher told the students _____ in class.[ ]
A. not talk
B. don't talk
C. didn't talk
D. not to talk
抢修作业时，邻线动车组接近前（）分钟，作业本线防护人员通知现场作业负责人员停止作业、下道避车（可在防护栅栏内避车）。
A.5
B.6
C.8
D.10
