问题 多项选择题

cdma常用的路测设备Panorama路测软件支持高度图、光栅扫描图、矢量图、标注图、扫描图等多种类型的地图图形文件的导入,下面说法正确的是()

A、需要确定地图文件的左下角和右上角的东北坐标值;

B、利用Mapinfo可以获取坐标值,其中“投影”的类别项设成Lon./Lat.(WGS84);

C、需要确定地图文件的左下角和右上角的直角坐标值;

D、在Mapinfo上配准3个点即可将扫描地图定位。

答案

参考答案:A, B, D

单项选择题
单项选择题

Today more and more people go to websites when looking for information. Although most readers go to websites for news and e-mail, a form of person-to-person news, or in the form of chatting, they also read books on the web. It’s called electronic book (e-book).

Electronic books could revolutionize reading, but people ought to consider their far-reaching impacts as well. "The e-book promises to cause a slow tragedy on life as we know it," Jason Ohler, professor of technology assessment, university of Alaska Southeast In Juneau, warned the World Future Society, Bethesda, Md. His assessment weighed the pros and cons (赞成和反对的理由) of e-book technology’s impact on social relationships, the environment, the economy, etc. Before you curl up (蜷曲) with an e-book, consider the disadvantages.

They increase eyestrain due to poor screen resolution, replace a relatively cheap commodity with a more expensive one, and displace workers in print-book production and traditional publishing. E-books make it easy to share data, thereby threatening copyright agreements and reducing compensation (补偿) of authors, as well as creating nonbiodegradable (不可生物降解) trash.

On the other hand, e-books save paper and trees, reduce the burden of the carrying and storing of printed books, promote self-sufficiency in learning, and make reading a collaborative experience online. They also create new jobs for writers and artists and encourage self-publishing. In final analysis, Ohler points out, e-books should gain society’s approval if a few conditions are met: make them biodegradable and recyclable, solve the problem of eye fatigue, be sure the "have-nots" get the technology, and support e-book training in schools and business.

what is Jason Ohler’s attitude towards e-books().

A. Positive.

B. Indifferent.

C. Cautious.

D. Suspicious.