承运人不办理蜜蜂的变更。
参考答案:对
I noticed my little son ____ the words ____ on his small blackboard. [ ]
A. read; writing
B. reading; writing
C. to read; written
D. read; written
当筏形基础混凝土强度达到设计强度的( )时,可进行基坑回填。
A.40%
B.20%
C.30%
D.10%