在金属容器内或狭小的金属结构空间内焊接时，要设监护人，使用的行灯电压为36V。

电路中有一段导体，给它加20mV的电压时，通过它的电流为5mA，可知这段导体的电阻为______Ω，如给它加30mV的电压时，它的电阻为______Ω；如不给它加电压时，它的电阻为______Ω．

一般来说，税务机关组织税款的征收与入库，要先后经历三个主要环节，分别为（）：

A.纳税申报环节

B.税款征收环节

C.税款提退环节

D.税款入库环节

Quickly, the picture comes alive with hyperlinks (超链接), offering the names of the buildings, towers and street features that appear in the photo. The hyperlinks lead to information about the history, services and context of all the features in the photo. You have just hyperlinked your reality.

That might be a little unbelievable, but the technology exists and is no fevered imagination. This is not a cool small machine invented for the next James Bond movie; this is a working technology just developed by European researchers. It could be coming to a phone near you, and soon.

This, as the marketing types say, is a game changer. It develops a completely new interface (界面) that combines web-technology with the real world. It is big and fresh, but it goes much further and has much greater influence.

The development of the system is most outstanding because image recognition technology has long been pregnant with promise, but seemed to suffer from an unending labour.

Now MOBVIS has not only developed image recognition; it has also developed more applications for the technology; and it has adapted it to the world’s most popular technology: the mobile phone.

The MOBVIS system completely rewrites the rules for exploration and interaction with your physical environment. The system begins with panoramas (一连串景象). These panoramas form the basis of a city database. It can match buildings, towers, banners and even logos that appear in the panoramas.

A user simply takes a picture of the street feature, MOBVIS compares the user’s photograph to the panoramas and then identifies the buildings from the picture you take and the relevant links are returned.

Then you simply click on the links, using a touch-screen phone, and the MOBVIS system will provide information on the history, art, architecture or even the menu, if it is a restaurant, of the building in question.

67. Which is introduced in the passage?

A. A new game software.                                                 B. A popular mobile phone.

C. A cool small machine.                                              D. An image recognition system.

68. What can we learn about the new technology?

A. It can only be put into use on mobile phones.

B. It is a little unbelievable and just a fevered imagination.

C. It has taken an unending labor to bring the technology into our lives.

D. It will encourage the users to take more pictures of the street features.

69. What is the right order of the operation of MOBVIS?

a. A city database forms in the system.

b. MOBVIS recognizes the picture and links are returned.

c. A user touches the links on the phone screen.

d. A user takes a picture of the street feature.

e. MOBVIS provides information in question.

A. a; e; c; d; b;                        B. a; d; b; c; e            C. d; c; e; a; b                    D. c; a; e; b; d

70. From the passage, we can infer that _______.

A. MOBVIS has already been widely used all over the world

B. the writer is trying to promote the sales of the MOBVIS system

C. this new technology will soon be very popular in our lives

D. the sales of mobile phones will decrease as MOBVIS comes on market

毛纤维纵向（），表面覆盖（），横截面呈（）。

高质效传递是指在应试教育施教过程中应高速度、高质量和高效益地进行知识信息（技能）传递交流（）