问题 实验题

实验中学物理课外实验小组,为了探究物体浸在水中不同深度所受浮力的变化情况,进行了如下的实验:将一挂在弹簧测力计下的圆柱型金属体(高度为10cm)缓慢浸入水中(水足够深),从圆柱体接触水面至接触容器底之前,分别记下圆柱体下表面所处的深度h和弹簧测力计的示数F。实验数据如下表。

(1)请将后4次实验计算出的浮力填入表格;

(2)依据表中数据,在下边的坐标系中画出浮力F与深度h关系的图象;

(3)通过对图象的分析,你得到的结论是:_______________________

答案

(1)2.00,2.50,2.50,2.50

(2)

(3)

在圆柱体未浸没入水中之前,所受的浮力与深度成正比;

在圆柱体浸没入水中之后,所受的浮力与深度成无关。

选择题
阅读理解

Shopping is not as simple as you may think! There are all sorts of tricks each time we reach out for that particular brand(品牌)of product on the shelf.

Colouring, for example, varies according to what the producers are trying to sell. Health foods are packaged(包装)in greens, yellows or browns because we think of these as healthy colours. Ice cream packets(包装) are often blue and expensive goods, like chocolates, are gold or silver.

When some kind of pain-killer (止痛药) was brought out recently, researchers found that the colours turned the customers off because they made the product look weak and ineffective. Eventually, it came on the market in a dark blue and white package — blue because we think of it as safe, and white as calm.

The size of a product can attract a shopper. But quite often a bottle doesn’t contain as much as it appears to.

It is believed that the better-known companies spend, on average, 70 percent of the total cost of the product itself on packaging!

The most successful producers know that it’s not enough to have a good product. The founder of Pears Soap, who for 25 year has used pretty little girls to promote(促销)their goods, came to the conclusion: “Any fool can make soap, but it takes a genius(天才) to sell it.”

小题1:. Which of the following may trick a shopper into buying a product according to the text? 

A.The cost of its package

B.The price of the product

C.The colour of its package

D.The brand name of the product小题2:. The underlined part “the colours turned the customers off” (in Para.3) means that the colours ________ .

A.attracted the customers strongly

B.had weak effects on the customers

C.tricked the customers into shopping

D.caused the customers to lose interest小题3:. Which of the following is the key to the success in product sales?

A.The way to promote goods.

B.The team to produce a good product

C.The discovery of a genius.

D.The brand name used by successful producers.小题4:. Which of the following would be the best title for this text?

A.Choice of Good Products.

B.Disadvantages of Products.

C.Effect of Packaging on Shopping.

D.Brand Name and Shopping Tricks.