从方框中选出适当的句子补全对话 Maria: Did you like to e

在下列情况下，所提及单位无资格参加投标的是( )。

A．在工程建设项目施工招标时，甲公司是该招标项目的前期设计单位

B．在机电产品国际招标时，乙公司是该项目招标代理机构的子公司

C．在工程建设项目货物招标时，丙和丁公司同属于A公司的下属公司

D．M是甲和丙公司的董事长，两家公司在同一货物招标中同时投标

E．戊公司分别委托了C和D两家代理商投标一项工程建设货物招标

方丝弓矫治器最主要的特点是（）。

A.支抗力大

B.体积小戴用舒适

C.能有效大地控制矫治牙各个方向的移动

D.操作简单工作效率高

E.价格低易于推广

会计主体和法律主体并非对等的概念，会计主体一定是法律主体，但法律主体不一定是会计主体。( )

The ARPANET (79) ( the rules of syntax that enable computers to communicate on a network) were originally designed for openness and flexibility, not for (80) The ARPA researchers needed to share information easily, so everyone needed to be an unrestricted "insider" on the network. Although the approach was appropriate at the time, it is not one that lends itself to today’s commercial and government use.
As more locations with computers (known as (81) in Internet parlance)joined the ARPANET, the usefulness of the network grew. The ARPANET consisted primarily of university and government computers, and the applications supported on this network were simple: electronic mail ( E - mail), electronic news groups, and (82) connection to other computers. By 1971, the Internet linked about two dozen research and government sites, and researchers had begun to use it to exchange (83) not directly related to the ARPANET itself. The network was becoming an important tool for collaborative research.

A) long B) remote C) far D) distant

不能随载荷的去除而消失的变形称为（）。

A.弹性变形

B.塑性变形

C.强化变形