Question

【题目】 A cell phone is one of the few things that we hold close to our faces all the time, and yet it could possibly explode – this is what made the recent Samsung’s Galaxy Note 7 smart phone accidents so shocking.

According to technology news website, The Verge, flawed (有瑕疵的) phone batteries might be to blame.

Even if you are not a science student, you probably know that it is common sense that the negative end and the positive end of the battery should never touch. If they do, the battery will short-circuit (短路), causing a powerful electrical reaction that can destroy the battery and cause a fire.

This is why all lithium-ion (锂离子) batteries – the kind that can be found in many of our devices (电子设备) like tablets and cameras – have a separator layer inside to stop the two ends from touching one another.

But somehow, the separators in some of the Samsung phones broke, causing explosions.

Overcharging is another problem that can make batteries heat up quickly. Fortunately, most batteries are designed to be able to automatically stop charging once they are fully charged. But again, this somehow failed to happen in some of the Samsung phones.

According to Lynden Archer, a materials scientist at Cornell University, US, we have already achieved 90 percent of the battery life possible from a lithium-ion battery. Customers’ demands that their devices get thinner and their battery have a longer life have given producers little choice but to try to put more power into thinner batteries. However, the more energy you put into a box, the more dangerous it’s going to be.

【1】A separator layer is put in lithium-ion batteries in order to ______.

A.ensure a longer battery life

B.reduce a certain electrical reaction

C.connect the anode and the cathode

D.prevent a battery from short circuiting

【2】What are the possible reasons for the Samsung phone explosions?

A.Pushing the limits of batteries.

B.Short circuiting and overheating.

C.Overcharging and thinner batteries.

D.Automatic charging and broken separators.

【3】What is the writer’s main purpose of writing the article?

A.To describe problems facing cell phone producers.

B.To warn us about the dangers of lithium-ion batteries.

C.To teach us common sense when it comes to batteries.

D.To explain the reasons for the Samsung phone explosions.

Answer 1

【答案】

【1】D

【2】B

【3】D

【解析】

这是一篇说明文。这篇文章对三星手机爆炸的原因进行了详细的分析。

【1】细节理解题。根据This is why all lithium-ion（锂离子）batteries - the kind that can be found in many of our devices like tablets and cameras - have a separator layer inside to stop the two ends from touching one another.（这就是为什么所有的锂离子电池——在我们的许多设备中都能找到的那种，比如平板电脑和相机——内部都有一个隔离层，防止两端相互接触。）可知在锂离子电池中放一个分离层是为了阻止电池短路，所以选D。

【2】推理判断题。根据If they do, the battery will short-circuit , causing a powerful electrical reaction that can destroy the battery and cause a fire.（如果他们这样做，电池将短路，导致一个强大的电反应，可以破坏电池，并导致火灾。）以及Overcharging is another problem that can make batteries heat up quickly.（过度充电是另一个会使电池迅速升温的问题。）可推断出造成三星手机爆炸的直接原因是短路和过热，所以选B。

【3】推理判断题。根据文章第一段引出话题，即三星手机爆炸事件，后面分别分析了两种可能的原因，可知这篇文章的目的是对三星手机爆炸的原因进行了详细的分析。故选D。

根据事物的定义或者对事物总体的概括，从而判断出哪些具体事物或者具体的实践应该属于定义的范围或者是概括的范围是我们经常见到的推理判断题的题型。要解决这样的判断题，首先要讲对事物的定义或者对事物的总体概括要读清楚，然后根据对比4个选项，哪个选项在定义或者概括范围内的。哪个就是正确的答案。如第二小题，根据If they do, the battery will short-circuit , causing a powerful electrical reaction that can destroy the battery and cause a fire.（如果他们这样做，电池将短路，导致一个强大的电反应，可以破坏电池，并导致火灾。）以及Overcharging is another problem that can make batteries heat up quickly.（过度充电是另一个会使电池迅速升温的问题。）可推断出造成三星手机爆炸的直接原因是短路和过热，所以选B。