题干

【探究名称】影响液体蒸发快慢的因素

【提出问题】液体蒸发快慢跟哪些因素有关?

【猜想与假设】通过观察图甲和联系生活实际进行猜想

 
                                                    甲

猜想一:液体蒸发快慢可能跟液体____的高低、液体____的大小和液体表面空气流动快慢有关。

猜想二:相同条件下,将水和酒精同时擦在手臂上,酒精更容易干,猜想液体蒸发快慢可能还与____有关。

【设计与进行实验】小明同学对其中的一个猜想进行了如下实验:

如图乙所示,在两块相同的玻璃板上,分别滴一滴质量相等的酒精,通过观察图中情景可知,他探究的是酒精蒸发快慢与____是否有关。此实验过程中需控制酒精的____和其表面上方空气流动快慢相同。

【交流与评估】

我们知道液体蒸发时要吸热,请你举一个应用蒸发吸热的事例:____

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答案(点此获取答案解析)

温度,表面积,液体的种类,液体的表面积,温度,夏天在地上洒一些水会感到凉快

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阅读理解

    “Image is everything.” An entire industry has been built upon the concept that image is everything, but an appealing image isn't enough when there's no substance behind it.

    First of all, one should consider how important image is in selling products and services. Advertising agencies have raised the art of creating an image to a state of near perfection. But if the product or service doesn't live up to it, customers will be very dissatisfied. The recent scandal (丑闻) about the Arthur Andersen accounting firm showed that behind that image, it had unfair business practices under the table. Despite the previous positive image, the firm is being accused of criminal actions. Although the image had been nearly perfect, the reality behind the image has led to its downfall.

    Similarly, personal consultants(顾问) can build up a very positive public image for politicians and movie stars in the view of the general commons. But once again, history is filled with examples of both that fell from grace (体面) like the story of the Hollywood actor giving in to the pressures of fame and fortune. With people, just as with products and services, image is certainly important, but without positive substance behind it, failure is close.

    To conclude, it's clear that an appealing image is extremely important to success, whether that image is related to selling a product or service or to the “selling” of a person. But image is only half of the equation(等式). What lies behind that image is every bit as important as the image itself — the person or product must live up to that image or there's little chance for long-term success.