运用光的“色调”创造环境时，（）看起来轻一些。
参考答案：冷色的物体
— Let's go for a walk，shall we?
— It's too late now; _____，it's beginning to rain. [ ]
A. in addition
B. in a word
C. as a result
D. in general
单钩溜放是指机车每加减速（）次溜放出1个车组。
A.1
B.2
C.3
D.4
