照明工程中，常用的光度量有（）。
A.光通量
B.发光强度
C.照度
D.亮度
E.辐射通量
参考答案：A, B, C, D
Number the sentences. (为下面对话排序）
( )They are three dollars a kilo.
( )Thanks and see you later.
( )Sure. Here you are. Three dollars, please.
( )Thanks. Here is three dollars.
( )How much are the tomatoes?
( )May I have a kilo, please?
北京奥运会开幕式的时间预计是从当天晚上8：00开始，11：30结束，将持续______小时______分钟．
