题目内容

 -- How can I ______ well with my lessons, Dad?

  -- Practice makes perfect.

     A. work on           B. hold on             C. get on              D. keep on

 

【答案】

C

【解析】略

 

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Lake Victoria is the largest lake in Africa. It is also the second largest lake in the world. It is an important lake because it is one of the sources(源头) for the longest river in the world, the Nile River. Lake Victoria provides a source of water, food, and power(电力) for several African countries. Lake Victoria is a big part of African life.

Unfortunately, Lake Victoria has a problem. It is shrinking. There are several power stations at Lake Victoria in Uganda. These are on the Nile River, and besides producing power, they keep the water of the lake at a certain level. For the past forty years, that level has been 11.9 meters. Over the last several years, the water level has dropped by about 2.5 meters. There seem to be several reasons for this drop.

One possible reason is drought(干旱). Drought has been very bad in the area since 2000. Lake Victoria gets all of its water from rain, so the drought means less water in the lake.

However, some environmentalists believe that the real problem is the power plants(工厂) on Lake Victoria. Uganda depends on those power plants for most of its power, and they made the power plants larger in 2000. Many people believe the power plants have been taking too much water off Lake Victoria. As a result, they have been asked to use less water until Lake Victoria goes back to its old level.

Whether the low water level is caused by drought or power plants, the result is the same. This is already a poor area of Africa, where many people live a really hard life. People, animals and plants around Lake Victoria will suffer even more from low water levels on the lake. Many people need Lake Victoria for fishing or growing food. Fish need the water to live, and animals need it for water. Plants around the lake will die without the water, and then more animals and people will suffer. Unless the lake fills soon, many people will suffer and die.

1.Lake Victoria is __________.

A.an important lake in Africa

B.the largest lake in the world

C.the source of water, food and power for America

D.the only source for the Nile River

2.What does “It is shrinking” most probably mean?

A.It is becoming larger.

B.It is becoming more beautiful.

C.It is becoming smaller.

D.It is becoming more useful.

3.The water level of Lake Victoria is now __________.

A.2.5 meters        B.11.9 meters        C.14.4 meters        D.9.4 meters

4.Which of the following is NOT true according to the passage?

A. Rain water is the only source for the lake.

B. There has been little rain in the lake area since 2000.

C. The power plants in Uganda provide water for the lake.

D The power plants in Uganda were made larger in 2000.

5.According to the passage, how can we solve the problems around Lake Victoria?

A.People must build more power plants.

B.More sources of water must be found.

C.Every country should offer some money to Africa.

D.All the people living in the area should move to another place.

 

We use passwords(密码)to keep our personal information secret and safe, but some passwords we use may not be as reliable as we think.

Splash Data, a computer security company, recently released a list of the 25 worst passwords of 2011.This list is based on the research of hackers’ files containing stolen passwords. According to the list, “password” is the worst and most common password. Many others on the list are numbers in order either forward (for example,1234) or backward. Letters on the keyboard in order, such as “qwerty” are also common, as well as some first names and animals. “Hackers can easily break into many accounts(账户) just by trying common passwords again and again, ” said Morgan Slain, CEO of Splash Data.

How can you make a strong password? It should be eight characters or more, with a mix of letters, numbers and symbols. One way to create a long and easy-to-remember password is to separate short words with spaces or numbers. Having safe passwords is necessary for surfing the Internet safely. But it’s not the only thing you must do to keep safety online. Here are some other web safety tips:

●Never give out information that will allow someone to find you offline. That includes your full name, address and phone number.

●Don’t include your real name as part of your online screen name.

●Never meet people you met on the Internet in person. If you insist on breaking this rule, meet in a very public place and consider taking an adult with you.

Top 10 worst passwords: 1.password   2. 123456    3. 12345678   4. qwerty    5. abc123  6. monkey   7. 1234567    8. letmein     9.trustno1  10. dragon

1.What is “Splash Data”?

A.A company.        B.A TV station.        C.A scientist.         D.An American.

2.The underlined word hacker means “   ” in Chinese.

A.流浪者           B.黑客             C.银行职员         D.软件设计师

3.Which is the worst and most common password?

A.abc123.           B.monkey.           C.password.         D.123456.

4.You can’t put your ______ on the Internet.

A.address           B.phone number     C.name             D.A,B and C

5.Which of the following is NOT true?

A.Animal names can be very safe passwords.

B.You can meet people you met on the Internet in person in a very public place.

C.You can’t use your real names as part of your online screen name.

D.It’s necessary to have a password for surfing the Internet safely.

 

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