搜题请搜索小程序“爱下问搜题”
问题 选择题

以下学习用品中，在通常情况下属于导体的是（　　）

A．绘画橡皮

B．金属小刀片

C．物理课本

D．塑料三角板

答案

常见的导体包括：人体、大地、各种金属、酸碱盐的溶液等，题中四个选项中，金属小刀片是导体，其他三个是绝缘体．

故选B．

单项选择题

Object-oriented DBMS integrated a variety of (81) data types-such as business procedures, graphics, pictures, voice and annotated text.

Object orientation also makes a (82) to application development efficiency. It makes the data, functions, attributes, and relationships an integral part of the (83) . In this way, objects can be reused and replicated.

Some leading RDBMS vendors support the concept of integrating object management capabilities with their current line of relational products. That capability enable users to the development cycle, since integrity logic and business roles no longer need to be programmed (84) each application.

（81）是（）

A.tool

B.in

C.idea

D.contribution

E.joke

F.short

G.object

H.theoretical

I.extent

J.shorten

K.real-world

L.into
查看答案
单项选择题

根据《建筑施工模板安全技术规范》(JGJ 162 2008)，支撑梁、板的钢管支架的扫地杆.水平拉杆采用（）连接方式。

A.搭接

B.焊接

C.对接

D.铆接
查看答案