问题 单项选择题

关于焦虑的论述错误的是()。

A.轻度焦虑对人是有益的

B.任何程度的焦虑均会对人造成不良影响

C.焦虑是个体对模糊威胁的不适感

D.焦虑会导致生理、情感及认知方面的改变

E.医护人员不恰当的言行可增加病人的焦虑

答案

参考答案:B

解析:[知识点] 焦虑的分级

单项选择题
单项选择题

A total of 4.6 million digital televisions have been sold, and the sales of HDTV sets have quadrupled since last year. Consumers have bought HDTVs to play their DVDs and to have clearer pictures and wide screens. Only a small percentage of the people who have purchased HDTVs, however, have actually hooked their TVs up to receive high-definition television digital signals. Perhaps television viewers are having trouble keeping up with the changes in technology. Even the manufacturers of HDTVs, like Mitsubishi, Thomson Multimedia, Sony, and Samsung seem to have a tough time learning how to make their sets work with the various digital TV formats because little standardization has been required or implemented in the industry.

Some of the HDTVs weigh over 200 lbs., and a variety of retailers offer a delivery service to the buyer’s home to help install the heavy sets. This is known as a white-glove service and usually comes with an extra fee. After HDTV purchasers get their sets home and hook them up, they will still need to work to get the digital signals to their systems. Most of the industry’s cable providers do not yet offer high~definition programing, and only about 15% of commercial television stations have switched over to even the lowest improved digital pictures. Worse yet, viewers may need to install antenna before they can even get the digital signals to their new HDTV sets. Another frustration for home-theater seekers is that the current HDTV sets allow owners only to watch high-definition programs, not to record them.

On the whole, this passage is positioned to dwell on ().

A. the overall picture of the HDTV sector

B. how the giant TV makers should offer better products

C. a lament over consumers’ inability to use a high-end TV set

D. a criticism of the TV makers for doing nothing about a big problem