Many economists pointed out the fatal error for this crisis.
A. crucial
B. puzzling
C. attractive
D. exciting
The conclusion can be deduced from these data.
A. research
B. result
C. cause
D. process
钢模板部件拆除后,临时堆放处离楼层边沿不应小于()m,堆放高度不得超过()m。
A. 0.5
B. 2
C. 1
D. 1.5
临边作业防护栏杆在基坑四周固定时,可采用钢管打入地面()深。
A. 50-70cm
B. 20-50cm
C. 1.0m
D. 1.0-1.5m