网架结构整体安装的吊点布置原则是位置和数量尽可能与其使用时受力状态相近。
参考答案：对
The politician has been warned that he would be getting into great trouble ________stick to his standpoint.
A．were he to
B．he will
C．he was to
D．would he
伯道疏螺旋体的传播媒介是（）。
A.蚊
B.蝗
C.蚤
D.虱
E.螨
