对外开放是我国一项长期的基本国策。( )
参考答案:对
解析: 十一届三中全会决定了把全党工作重点转移到社会主义现代化建设上采,同时把对外开放作为我国一项长期的基本国策。
留置垂直施工缝时,端头必须安放模板,设置()。
A.诱导缝
B.止水带
C.变形缝
D.遇水膨胀止水条的固定和安装
In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.
It is more and more usual that users of Information Retrieval (IR) systems must face up to response of hundreds or thousands of (1) documents. A significant proportion of them are moreover (2) or redundant. This is a straight consequence of two well - known facts: the incessant growing of documental databases and the lack of ability of most users to define (3) information needs. In such a framework, further effective retrieval techniques are only part of the solution. Interfaces with alternative ways for organizing and (4) the results returned by a (5) would be of great utility assisting users to find relevant documents. Document clustering may play a central role as an effective technique for organizing query results.
1()
A.replied
B.retrieved
C.received
D.relied