相关考题
-
单项选择题
建筑物耐火等级共分几级以及二级耐火等级楼板的耐火极限分别为：
A.四级，1.5h
B.三级，1.Oh
C.四级，2.Oh
D.四级，1.Oh -
单项选择题
There()a dolphin show in the zoo tomorrow evening.A. wasB. will haveC. will be
A.
A. -
单项选择题
For days, smog persisted in many areas. China is()to control air pollution.A. take measuresB. doing businessC. taking measures
A.
A.
