I don’t understand ____ believe him.
A. why don ’t you
B. why you no
C. why you don ’t
D. why not you
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墙或柱是建筑物的承重配件,承受屋顶、楼板下传来的各种荷载,并连同自重一起传给基础()
The little boy didn’t know_______.
A. Which hat is hi
B. which hat his is
C. which hat was his
D. which hat his was
载重量对小客车的平均技术速度没有实际影响。
A. 错误
B. 正确
目前,我国三、四级公路占的比例较大,一、二级公路占的比例较小。
A. 错误
B. 正确