脊椎动物运动系统的组成有 ①皮肤②骨骼肌③骨④骨连接 A．①②③ B．①②④ C

焦炭塔腐蚀的原因？

关于冬季钢筋焊接说法正确的是（）

A、当环境温度低于-5℃时，应调整钢筋焊接工艺参数，使焊缝和热影响区缓慢冷却

B、当风力超过四级时，应有挡风措施

C、当环境温度低于-20℃时不得进行焊接

D、当风力超过六级时，应有挡风措施

电路中任意两点间的（）称为这两点的电压，通常用符号（）表示。电压与电位是两个不同的概念，电位是相对的，某点电位的大小与（）的选择有关，电压是绝对的，与（）的选择无关。

You want to use the Web to let (76) users or your customers look (77) corporate information. But you want to keep installation at the user end (78) and you don’t want just. (79) to get (80) your databases. That may be where an application server enters the picture. For more user machine independent, these software packages, typically written in the (81) programming language for use on Windows (82) -based systems, act as go-betweens (83) browser-equipped end users to the databases that (84) the information they need to (85) .

A．access

B．accessing

C．assert

D．asserting