题目回填电杆拉线基坑时,如是石坑应掺土夯实,石与土比例为()且掺土均匀。A. 2:1B. 3:1C. 4:1D. 5:1回填电杆拉线基坑时,如是石坑应掺土夯实,石与土比例为()且掺土均匀。A. 2:1B. 3:1C. 4:1D. 5:1题目解答答案B. 3:1