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问题 选择题

人类对意识现象的认识经历了一个复杂的发展过程，在人类早期，人们曾把意识看作是一种独特的、寓于人的肉体之中并可以脱离肉体而存在的灵魂的活动。从意识的起源来看[ ]

A．意识是物质世界长期发展的产物

B．意识是人脑的机能

C．意识是客观存在的反映

D．意识是客观存在在人脑中的主观反映

答案

答案：A

单项选择题

鉴别醛固酮瘤及特发性醛固酮增多症，下列哪个试验最有意义（）

A.去氧皮质醇测定

B.18-羟皮质酮测定

C.皮质酮测定

D.血浆ACTH测定

E.血浆肾素-血管紧张素测定
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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.

"Hook up" as in "hooked their TVs up" underlined in Paragraph 1 most probably means to ().

A. have a hood over the TV

B. be connected to

C. relate oneself to

D. keep contact with
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