【题目】根据短文内容。从短文后的选项中选出能填入空白处的最佳选项,选项中有两项为多余选项。

The days when a cellphone was used for nothing beyond calling and texting are gone.Today,we turn smart phones into magical machines with apps that transform them into musical instruments or business machines or video players.But it turns out that we are only searching the surface.Who knew that smart phones would make pretty good satellites? 【1】

Smart phones forecast the weather

Networking expert Open Signal has discovered something interesting:the sensors in Android phones designed to measure battery temperature,light,pressure and 80 on can be used to generate surprisingly accurate weather reports.2

Smart phones save the rainforests

Detecting illegal logging(盗伐) may sound like a novel app,3 :in Indonesia,the non-profit organization Rainforest Connection’ wants to use donated Android phones to detect illegal logging.As New scientist reports,“The phones are equipped with solar panels specifically designed to take advantage of the brief periods when light reaches the forest floor.Their microphones stay on at all time,and the software listens for the sound of a chainsaw(链锯).”

4

Researchers at the university of Illinois have developed an iPhones app that turns the phone into a fully featured mobile medical lab that uses the phone’s camera to detect proteins,bacteria,viruses and other organisms.

Smart phones drive cars

Google’s self-driving cars carry around $30,000 of high-tech hardware and sensors,but students at Australia’s Griffith University think they can get the job done with a single smart phone. 5

A.but its a serious business

B.Here are some uses for smart phones the makers probably didn’t imaine.

C.so it can be used to detect the sound of a chainsaw

D.It has been used in many fields

E.Get enough phones involved and you will have a weather sensing network

F.Smart phones serve as mobile medical labs

G.They have built a model that relies mainly on the phone’s camera and built—in GPS

【题目】Secret codes(密码)keep messages private. Banks, companies, and government agencies use secret codes in doing business, especially when information is sent by computer.

People have used secret codes for thousands of years. 【1】Code breaking never lags(落后)far behind code making. The science of creating and reading coded messages is called cryptography.

There are three main types of cryptography. 2 For example, the first letters of “My elephant eats too many eels” spell out the hidden message “Meet me.”

3 You might represent each letter with a number, for example. Let’s number the letters of the alphabet, in order, from 1 to 26. If we substitute a number for each letter, the message “Meet me” would read “135520135.”

A code uses symbols to replace words, phrases, or sentences. To read the message of a real code, you must have a code book. 4 For example, “bridge” might stand for “meet” and “out” might stand for “me.” The message “Bridge out” would actually mean “Meet me.” 5However, it is also hard to keep a code book secret for long. So codes must be changed frequently.

A. It is very hard to break a code without the code book.

B. In any language, some letters are used more than others.

C. Only people who know the keyword can read the message.

D. As long as there have been codes, people have tried to break them.

E. You can hide a message by having the first letters of each word spell it out.

F. With a code book, you might write down words that would stand for other words.

G. Another way to hide a message is to use symbols to stand for specific letters of the alphabet.

【题目】Tom goes everywhere with Catherine Green, a 54-year-old secretary. He moves around her office at work and goes shopping with her. "Most people don't seem to mind Tom," says Catherine, who thinks he is wonderful. "He's my fourth child," she says. She may think of him and treat him that way as her son, buying his food, paying his health bills and his taxes, but in fact Tom is a dog.

Catherine and Tom live in Sweden, a country where everyone is expected to lead an orderly life according to rules laid down by the government, which also provides a high level of care for its people. This level of care costs money.

People in Sweden pay taxes on everything, so aren't surprised to find that owning a dog means yet more taxes. Some people are paying as much as 500 Swedish kronor in taxes a year for the right to keep their dog, money that is spent by the government on dog hospitals and sometimes medical treatment for a dog that falls ill. However, most such treatment is expensive, so owners often decide to offer health and even life premium for their dog.

In Sweden dog owners must pay for any damage their dog does. A Swedish Kennel Club official explains what this means: if your dog runs out on the road and gets hit by a passing car you, as the owner, have to pay for any damage done to the car, even if your dog has been killed in the accident.

【1】The money paid as dog taxes is used to ________.

A. provide medical care for dogs

B. pay for damage done by dogs

C. keep a high level of care for the people

D. buy insurance for dog owners

2The underlined world "premium" possibly means ________.

A. entertainment expenseB. medical check

C. payment for risksD. protection fee

3If a dog causes a car accident and gets killed, who should pay for the damage done to the car?

A. The government.

B. The owner of the car.

C. The insurance company.

D. The owner of the dog.

4From the text it can be inferred that in Sweden ________.

A. people care much about dogs

B. keeping dogs means asking for trouble

C. many car accidents are caused by dogs

D. dogs are welcome in public places

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