多层及高层钢结构设计要求顶紧的节点，接触面不应少于70%紧贴，且边缘最大间隙不应大于（）mm。
A.0.5
B.0.8
C.1
D.1.2
参考答案：B
The visit to the parents in the countryside, originally due to be paid last Sunday, was finally ________
because of the bad weather.[ ]
A. set off
B. called off
C. broken off
D. taken off
新生儿败血症最常见的并发症是
A．化脓性脑膜炎
B．肺炎
C．尿路感染
D．骨髓炎
E．腹泻
