题型:填空题 挖孔桩施工时,在()情况下设通风设备。A.二氧化碳浓度超过0.2%,其他有害气体超过允许浓度B.二氧化碳浓度超过0.1%,其他有害气体超过允许浓度C.孔深超过5mD.孔深超过10m 查看答案
题型:填空题 In his first class,the Chinese teacher tried to_______to children that reading is one of life's greatest pleasures.[ ]A. convey B. educateC. persuade D. convince 查看答案