题目内容

最大静摩擦力的方向总是与相对滑动趋势的方向相同。()

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力可沿作用线任意移动，而不改变该力对刚体的作用。()

在小李的婚礼上，婚庆公司和小李的家人都进行了全程录像，婚庆公司使用DV摄录机，小李的家人使用家用VHS摄录机。婚礼过后，小李把家人拍摄的VHS录像带拷贝交给婚庆公司，要求婚庆公司把家人录像带中记录的部分内容剪辑到婚庆公司制作的婚礼DVD中去。
婚庆公司DV摄录机具备1394接口和标准A/V端口两种信息传输接口，DV录像内容可以通过1394接口采集到计算机中，也可以通过计算机的模拟视频采集卡从A/V端口采集视频信号到计算机中。
①这两种视频采集方法的主要区别是什么？

？Read the extract below about advertising.
？For each question 31-40, write one word in CAPITAL LETTERS on your Answer Sheet.
Is More Advertising Needed
The effectiveness of advertising is a hugely controversial area. Conventional wisdom in the industry is that sales may well increase for a Certain period even after the advertising of a product ends. But (31) comes a point when sales start to decline and it then becomes extremely expensive to rebuild the brand. This supports the idea of continuous advertising. But some people in the industry believe the conventional wisdom is (32) longer true. When America's big TV networks reached prime-time audiences of 90% of households, they were a powerful way to build a brand. (33) that those audiences might be as low as one-third of households, other ways of promoting a brand have (34) more competitive. Moreover, many clients never really embraced continuous advertising: when times get tough, just as they (35) after 2000, one of the first things many companies cut is their ad budget.
Robert Shaw, a visiting professor at the Cranfield School of Management in Britain, runs a forum in (36) a number of big companies try to monitor the "marketing payback" from advertising. The return from traditional media was, he says, "never terribly good". Generally nearly half of ads provide a return (37) their investment. And there can be various reasons why ads influence sales, other (38) their direct effect on consumers. (39) instance, if a producer announces a multi-million dollar ad-campaign, then retailers are often persuaded to increase, deliveries. This can result (40) a "distribution effect" that leads to additional sales.
(31)

汽车专用零件的互换性比较差。()