问题 阅读理解

Shopping is not as simple as you may think! Much has to be done for the producers before putting the products on the shelf.

Color, for example, changes a lot according to what the producers are trying to sell. Health foods are packed in greens, yellows or browns because we think of these as healthy colors.

When some kind of medicine was brought out recently, researchers found that the color of the package(包装) caused the shoppers to lose interest because they made the product look ineffective(无效的). At last, it came on the market in dark blue and white—blue because we think of it as safe, and white as calm.

The size of a package can also attract(吸引) a shopper, although quite often a bottle doesn’t hold as much as it appears to.

It is said that the better-known companies spend about 40 percent of the cost of the product itself on packaging!

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

小题1: Health foods are usually packed in colors Except ________.

A.green

B.black

C.yellow

D.brown小题2:Why did the shoppers lose interest in the medicine?

A.Because of the size of the product.

B.Because of the color of the product.

C.Because of the color of the package.

D.Because of the cost of the product.小题3:If a new product costs $ 60, how much money may be spent on packaging?

A.$ 24

B.$ 36

C.$ 40

D.$ 60小题4:Which of the following is the key to the success in product sales?

A.The way to sell goods.

B.A good product.

C.The one who makes a product.

D.A nice color.小题5:The passage is mainly about ___________on shopping.

A.advantages of products

B.the importance of packaging

C.choices of products

D.the cost of packaging

答案

小题1:B

小题1:C

小题1:A

小题1:A

小题1:B

小题1:根据第二段第二行Health foods are packed in greens, yellows or browns可知,黑色不是用来包装健康食品的颜色。故选B。

小题1:根据第三段第二行the color of the package(包装) caused the shoppers to lose interest可知,药品的包装颜色使顾客失去兴趣。故选C。

小题1:根据倒数第二段可知,包装要花费产品费用的40%。故$60*40%可得$24。故选A。

小题1:根据最后一段最后一行 it takes a talent to sell it可知,光产品质量好还不够,还需要销售技巧。故选A。

小题1:文章首先讲了包装的颜色,后来又讲了包装的尺寸、费用等。故“包装的重要性”符合题意。故选B。

问答题

已知A、B、C、D、E都是元素周期表中的前四周期元素,它们原子序数的大小关系为A<C<B<D<E。又知A原子的p轨道为半充满,其形成的简单氢化物的沸点是同主族非金属元素的氢化物中最高的。D原子得到一个电子后其3p轨道将全充满。B离子比D原子形成的离子少一个电子层。C与B可形成BC型的离子化合物。E的原子序数为29。

请回答下列问题:

(1) 元素A简单氢化物中A原子的杂化类型是________,B、C、D的电负性由小到大的顺序为______(用所对应的元素符号表示)。C的气态氢化物易溶于水的原因是____________________。

(2)E原子的基态电子排布式为________。元素E的单质晶体在不同温度下可有两种堆积方式,晶胞分别如图a和b所示,则其面心立方堆积的晶胞与体心立方堆积的晶胞中实际含有的E原子的个数之比为____________。

(3)实验证明:KCl、MgO、CaO、TiN这4种晶体的结构与NaCl晶体结构相似(如图所示),其中3种离子晶体的晶格能数据如下表:

离子晶体NaClKClCaO
晶格能/kJ·mol17867153401
则该4种离子晶体(不包括NaCl)熔点从高到低的顺序是:________。

(4)金属阳离子含未成对电子越多,则磁性越大,磁记录性能越好。离子型氧化物V2O5和CrO2中,适合作录音带磁粉原料的是________。

(5)温室效应,科学家设计反应:CO2+4H2—→CH4+2H2O以减小空气中CO2。若有1 mol CH4生成,则有________mol σ键和________mol π键断裂。

单项选择题