下述药物中属于大环内酯类的药物有() A.罗红霉素 B.多西环素 C.克拉霉素 D.

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问题:

下述药物中属于大环内酯类的药物有()

A.罗红霉素

B.多西环素

C.克拉霉素

D.美满霉素

E.阿奇霉素

考点:皮肤科住院医师皮肤病治疗学皮肤病治疗学题库
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多效蒸发系统设置回流的目的是()。

A、补充塔的液位

B、降低塔的温度

C、降低塔顶气相中的乙二醇浓度

D、降低塔的压力

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为了支持各种信息的传输,计算机网络必须具有足够的带宽、很好的服务质量与完善的________。

A.应用软件

B.服务机制

C.通信机制

D.安全机制

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药材丁香的分泌组织是()

A.乳汁管

B.油管

C.油室

D.树脂道

E.黏液腔

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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.

10()

A.interaction

B.assimilation

C.differentiation

D.collaboration

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影厅功放的负载是喇叭()

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