问题 单项选择题 B型题

急性胰腺炎时血清淀粉酶()

A.起病后6~12小时升高,48小时下降,持续3~5天

B.起病后12~14小时升高,下降缓慢,持续1~2周

C.起病后24~72小时上升,持续7~10天

D.降低程度与临床症状平行

E.起病后3~4小时上升,12小时高峰,24小时下降

答案

参考答案:A

解析:急性胰腺炎时实验室检查结果可发现:多有白细胞增多及中性粒细胞核左移。血清淀粉酶在起病后6~12小时升高,48小时下降,持续3~5天,超过正常值3倍可确诊,其高低不一定反映病情轻重。尿淀粉酶在起病后12~14小时升高,下降缓慢,持续1~2周,但受尿量的影响。血清脂肪酶起病后24~72小时上升,持续7~10天,对病后就诊较晚的急性胰腺炎有诊断价值,其特异性较高。暂时性低钙血症常见于重症急性胰腺炎,低血钙程度与临床严重程度平行。

多项选择题
单项选择题

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.

5()

A.arrived

B.topped

C.overcame

D.descended