50kg/m钢轨轨底宽度为()。
A.114mm
B.132mm
C.150mm
D.148mm
参考答案:B
— What are you going to do when you _____ the work?
— I'm going to watch TV.
[ ]
A. will finish
B. finishes
C. finished
D. finish
“室内日照”的概念是指通过门窗透光部分,进人室内的()。
A.直射光
B.散射光
C.可见光
D.红外光
E.所有的亮光