下列关于刺激和反应的说法,哪项是错误的( )A.有刺激必然产生反应 B.产生反应

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问题:

下列关于刺激和反应的说法,哪项是错误的( )

A.有刺激必然产生反应

B.产生反应时,必然接受了刺激

C.阈刺激时,必然产生反应

D.有刺激时,不一定产生反应

E.有时反应随刺激强度加大而增强

考点:基础医学苏州大学2006—2007学年度第一学期生理学期末考试试题B
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Z8代全线新品着力打造“最适合用来影音娱乐”,采用的是什么摄像头?()

A.50万像素摄像头

B.100万HD(支持720p高清)摄像头

C.300万像素摄像头

D.100万HD(不支持720p高清)摄像头

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如图表示一交流电的电流随时间而变化的图象,此交变电流的有效值是(  )

A.5A

B.5A

C.3.5A

D.3.5A

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在Lightroom中使用了Shift-Tab键隐藏了其他所有的面板后,使用()键可以回到网格视图。

A、A键

B、T键

C、G键

D、L键

E、P键

F、X键

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Until the late 1940s, when television began finding its way into American homes, companies relied mainly on print and radio to promote their products and services. The advent of television (1) a revolution in product and service. Between 1949 and 1951, advertising on television grew 960 percent. Today the Internet is once again (2) promotion. By going online, companies can communicate instantly and directly with prospective customers. (3) on the World Wide Web includes advertising, sponsorships, and sales promotions (4) sweepstakes, contests, coupons, and rebates. In 1996 World Wide Web advertising revenues (5) $ 300 million.

Effective online marketers don’t (6) transfer hard-copy ads to cyberspace. (7) sites blend promotional and non-promotional information indirectly delivering the advertising messages. To (8) visits to their sites and to create and (9) customer loyalty, companies change information frequently and provide many opportunities for (10) .

A prototype for excellent (11) promotion is the Ragu Web site. Here visitors can find thirty-six pasta recipes, take Italian lessons, and view an Italian film festival, (12) they will find no traditional ads. (13) subtle is the mix of product and promotion that visitors hardly know an advertising message has been (14) . Sega of America, maker of computer games and hardware, uses its Web site for a (15) of different promotions, such as (16) new game characters to the public and supplying Web surfers the opportunity to (17) games. Sega’s home page averages 250,000 visits a day. To heighten interest in the site, Sega bought an advertising banner on Netscape (18) increasing site visits by 15 percent. Online (19) in Quaker Oats’ Gatorade promotion received a free T-shirt in exchange for answering a few questions. Quaker Oats reports that the online promotion created product (20) and helped the company know its customers better.

13()

A.Since

B.However

C.Such

D.So

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往复式压缩机的排气量与转速成反比。()

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