堵水施工时卡点层段无串槽，套管内壁光洁无粘结物。
参考答案：对
只要填饱肚子，青少年不必注意饮食习惯和饮食结构。[ ]
Before building a house, you will have to ____ the government's permission. [ ]
A. get from
B. follow
C. receive
D. ask for
