建筑物地下室墙身防潮,应在墙面外侧填()。
A、高渗透性土壤
B、低渗透性土壤
C、任意土壤
D、素混凝土
参考答案:B
The traffic rule says young children under the age of four and ______ less than 40 pounds must be in a child safety seat.
A.being weighed
B.to weigh
C.weighing
D.weighed
主厂房运行层消火栓的数量和位置,应保证运行层()部位有()股充实水柱同时到达。