转换效率比较高的太阻电池材料是（）。
A、砷化镓
B、非晶硅
C、单晶硅
D、陶瓷
参考答案：A
多式运输的规范英文应是“MULTIMODAL TRAHSPORT”。 ( )
It was too late for the traveller to reach home, so they had to be ____ to shake down with blankets
in the inn parlour(接待室). [ ]
A. eager
B. glad
C. content
D. nervous
