气瘿的主要病因是： A．血栓性浅静脉炎 B．血栓性深静脉炎 C．游走性浅静脉炎 D．

John is ______ one of the best shop assistants who ______ in this department store.[ ]

A. thought of; work

B. thought; works

C. considered; work

D. considered as; works

手部出血时，压迫（）血管可以止血。

A.桡动脉

B.股动脉

C.尺动脉

D.颞浅动脉

E.肱动脉

银企对账应实行（）的原则，有效防范风险。

A、多种方式并存，突出重点账户

B、工作岗位独立，多种方式并存

C、工作岗位独立，对账人员分离，多种方式并存，突出重点账户

D、集中对账机构

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.

A majority of HDTV consumers could not enjoy high-quality digital pictures because________.

A．they did not tune in to the right channel

B．they did not install the system

C．the market retailers created the confusion on purpose

D．the manufacturers did not have a uniform standard for their sets

在信息技术教学中，采用哪几种教学评价策略？