结晶器内弧捞渣不净易造成渣漏。
参考答案:对
It suddenly to me that we could use a computer to do the job.
A.took place
B.happened
C.occurred
D.was occurred
园林中照明质量主要包括()等。
A、照明的亮度
B、合理的照度
C、照明均匀度
D、眩光限制