黑龙江学位英语考试模拟练习题
The studies compared 1,251 brain cancer patients with 1,221 cancer-free people. All subjects were short-term cell phone users who chatted less than three hours per month and owned a cell phone for three years. Neither study proved a conclusive link between using cell phones and brain cancer. "But these studies don't answer the questions, is it absolutely impossible for cell phones to cause brain cancer?" says John Molders, a cancer specialist at the Medical College of Wisconsin.]
Yet not all scientists agree cell phones are harmless. Previous research has shown a possible link between cell phones and brain cancer in animals, says Louis Slewing, editor of Microwave News. The issue is far from settled, he says.
Cell phones emit an invisible type of energy called radio waves. When you speak into a digital cell phone, your vocal vibrations are converted into digital signals (a series of on-off pulses). The phone's antenna then transmits the signals as radio waves, which bounce between radio towers and satellites in orbit above Earth.
While both sending and receiving calls, your cell phone emits a tiny amount of energy - less than one watt (energy unit per second) - next to your ear. Many experts think radio waves are harmless, even at the close range. Others however, think, "the jury is still out."
( ) 56. Two-thirds of Americans will use mobile phone by 2005.
( ) 57. There's still not definite conclusion as to whether cell phone cause brain cancer.
( ) 58. A research proves that the use of cell phones causes brain cancer in animals.
( ) 59. Cell phone transmits vocal vibrations from one to another.
( ) 60. Experts are divided about the harmlessness of radio waves.
Paper Two(60 minutes)
Part IV. Short Answer Questions (10 points; 15 minutes)
Directions: In this part there is a short passage with five questions or incomplete statements. Read the passage carefully. Then answer the questions or complete the statements in the fewest possible words (not exceeding 10 words.) Write your answers on the Answer Sheet of Paper Two. （请将此部分的答案写在试卷二的答题纸上）
Questions 61 to 65 are based on the following passage.
Wally worked in a shop that sold clocks．One day his next door neighbor, Harry, came into his shop. Harry was very stingy(吝啬的)．Wally said to him，"When are you going to buy a c1ock?"
"Never," Harry said．"I don't need a clock．"
"Everyone needs a clock，" Wally said．"How do you know when to get up?"
"The man who lives on the other side of me turns on his radio at seven o'clock, " Harry said．"I hear the announcer say，'The time is seven o'clock．Here is the news.'"
"OK．But how do you know when to go to work ? "
"By the time I get out of bed，wash and shave (剃胡子)，it's half past seven," Harry said．"By the time I've eaten my breakfast，it's eight o'clock，time to leave for the office．By the time I get to the bus stop，it's ten past eight. The bus arrives in a few minutes and by the time it gets to my stop，the time is half past eight．That's the time I start work．"
"OK. But how do you know when it's time to go home?" Wally said．
"The factory siren (号笛) rings．''
"How do you know when it's time to go to bed?"
"The television programs come to an end．"
"0K，" Wally shouted，really angry．"Now tell me what would happen if you woke up in the middle of the night and wanted to know the time?"
"That's easy，"Harry said．"I've got a hammer."
"A hammer! What good is a hammer?"
"I use it to knock on your wall. You'd shout at me，'What are you doing knocking on my wall at three o'clock in the morning?'"
61. Wally talked to Harry in the hope that ______________________.
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