保养
参考答案:
指对建筑物的洗涤或清洗之后,建筑物清洁的维护与保持;通过保养,减少建筑的污染侵蚀,延长建筑物装饰材料的使用寿命。
She doesn't know the school, but it's _____ to be quite a good one. [ ]
A. told
B. spoken
C. talked
D. said
可松动系数KS为1.10的土属于()。
A、松软土
B、普通土
C、坚土
D、砂砾坚土