对于工期要求较紧的工程,普通现浇方式无法满足要求时,世构体系展现出其施工时间快、节约材料和节省工程造价的优势。
参考答案:对
Many people are _____ on the hill.[ ]
A. playing the basketball
B. planting the trees
C. are planting the trees
24,35,48,63,()
A.81
B.80
C.82
D.83