下列物质中属于半导体的是[ ]
A.陶瓷
B.石墨
C.玻璃
D.硅
答案:D
不守纪律的句子跑乱了,请你帮它们按次序排好队。
A. No! I feel much better now!
B. What's the matter?
C. My stomach hurts.
D. I feel too sick to go to school.
E. You should go to bed. No birthday party. No birthday cake. Okay?
( ) ( ) ( ) ( ) ( )
某宾馆设中水系统,采用沐浴、盥洗和洗衣废水作为中水水源,该宾馆最高日用水量为 500m3/d,中水原水量最小应为( )m3/h。
A.185.6 B.180.9 C.120.6 D.150.7