焊接应力属于()应力,是在没有外部载荷作用下存在于焊件接头区内部的压力。A、内 B、

题型:单项选择题

问题:

焊接应力属于()应力,是在没有外部载荷作用下存在于焊件接头区内部的压力。

A、内

B、外

C、残余

D、拉

考点:冷作钣金工铆工(技师)铆工(技师)题库
题型:单项选择题

第四组:
患者,女性,56岁,久站或咳嗽时左腹股沟区胀痛1年,有慢性支气管炎病史3年,近1个月咳嗽加重。查体:站立时左腹股沟韧带下方内侧突起半球形肿物,平卧时缩小,咳嗽时无明显冲击感

应诊断为

A.左侧腹股沟斜疝

B.左腹股沟脂肪瘤

C.左腹股沟肿大淋巴结

D.隐静脉曲张结节膨大

E.左侧股疝

题型:单项选择题

Many businesses today use conferences as a means of discussing new plans of the company. As people are paying more attention to the environment and green problems, more businesses are looking for ways to reduce their negative effect on the environment. Many businesses do this by using Web conferencing.

Web conferencing is a technology that allows people to communicate more effectively over the Internet. It’s an easy way of hosting and attending conferences without having to leave the office. Each of the people involved in a Web conference will be posted an invitation to the conference with the time and date of the Web conference on it. When the conference is ready to begin, all participants (参与者) must sit at their computers and they will be connected over the Internet.

With Web conferencing all participants attend conference from the comfort of their own desks. Obviously, in doing this no fuel is used in traveling to and from a conference, and less work is taken up in attending a conference.

Any material to be used during Web conference is simply e-mailed to all the participants before the conference. Participants can then either choose to print material or read it on screen. This not only saves paper but also greatly reduces mailing costs for the business.

As a conference hall or business center isn’t being used, it means that the only power that is used is the power that is used by the participants’ personal computers. Similarly, conference organizers don’t have to arrange for food or overnight accommodation. All this means that less energy is used.

Often in business some companies actively choose to do business with other companies that do many things to reduce their negative impact on the environment. And Web conferencing helps you show other businesses that you are willing to work hard for the green cause.

小题1:What is the passage mainly about?

A.Ways of protecting the environment

B.Green benefits of Web conferencing

C.Ways of hosting a Web conference

D.Impact of Web conferencing on costs小题2:According to paragraph 1, many companies use Web conferencing because they ______.

A.are interested in using any new technology.

B.believe that Web conferencing is more convenient.

C.want to do something to protect the environment .

D.haven’t enough money to hold a traditional conference.小题3:The participants of a Web conference _____.

A.will be e-mailed an invitation before the conference.

B.are required to sit in an office together.

C.will receive many paper materials.

D.must have access to the Internet.小题4:Which of the following words best describes the author’s opinion about a Web conference?

A.Useless

B.Environmentally friendly

C.Inconvenient

D.Money-consuming

题型:单项选择题

不连续变异

题型:单项选择题

试述磁粉探伤的原理?

题型:单项选择题

变压器铁芯接地电流1年测一次。

更多题库