妥善维护保养防护用品，不但可延长防护用品的使用期限，而且能更好的保证用品的防护效果。
参考答案：对
"Why don’t you stay here over the weekend? " She said.
_______
A．She said why didn’t you stay there over the weekend.
B．She said why you don’t stay there over the weekend.
C．She asked me not to stay there over the weekend.
D．She suggested I should stay here over the weekend.
我国运输大动脉是[ ]
A、航空
B、公路
C、海运
D、铁路
