题目内容
All questions left ______ by history must be settled one by one.
a. alone b. off c. out d. over
D
智能训练练测考系列答案Holding a cell phone against your ear or storing it in your pocket may be dangerous to your health. This explains a warning that cell phone manufacturers include in the small print that is often ignored when a new phone is purchased. Apple, for example, doesn’t want iPhones to come closer to you than 1.5 centimeters; Research In Motion, BlackBerry’s manufacturer, recommends 2.5 centimeters.
If health issues arise from cell phone use, the possible effects are huge. Voice calls - Americans chat on cell phones 2.26 trillion(万亿)minutes annually - earn $109 billion for the wireless carriers.
Devra Davis, an expert who has worked for the University of Pittsburgh, has published a book about cell phone radiation, “Disconnect.” The book surveys scientific research and concludes the question is not settled.
Brain cancer is a concern that Ms. Davis examines. Over all, there has not been an increase in its incidence since cell phones arrived. But the average masks an increase in brain cancer in the 20-to-29 age group and a drop for the older population.
“Most cancers have multiple causes,” she says, but she points to laboratory research that suggests low-energy radiation could damage cells that could possibly lead to cancer.
Children are more vulnerable（易受伤的）to radiation than adults, Ms. Davis and other scientists point out. Radiation that penetrates only five centimeters into the brain of an adult will reach much deeper into the brains of children because their skulls are thinner and their brains contain more absorptive fluid（易吸收的液体）. No studies have yet been completed on cell phone radiation and children, she says.
Henry Lai, a research professor in the bioengineering department at the University of Washington, began laboratory radiation studies in 1980 and found that rats exposed to radiation had damaged DNA in their brains.
Ms. Davis recommends using wired headsets or the phone’s speaker. Children should text rather than call, she said, and pregnant women should keep phones away from the abdomen（腹部）.
【小题1】According to Ms Davis, brain cancer increase ____.
| A．among children | B．among old people |
| C．in the twenties | D．among pregnant women |
| A．Because they haven’t grown up. |
| B．Because they are too young to protect themselves. |
| C．Because they use cell phones more often than adults. |
| D．Because their skulls are thinner and their brains are easily hurt. |
| A．Pregnant women should keep cell phones away. |
| B．People should use cell phones in the correct way. |
| C．If you are a child, you’d better text than make phone calls. |
| D．When you use a cell phone, use a wired headset or the phone’s speaker. |
| A．Be careful when using cell phones. |
| B．Don’t hold your cell phone against your ear. |
| C．Rats exposed to radiation have damaged DNA in their brains. |
| D．Low-energy radiation could damage cells that could lead to cancer. |
Love, success, happiness, family and freedom——how important are these values to you? Here is one interview which explores the fundamental questions in life.
Question: Could you introduce yourself first?
Answer: My name is Misbah, 27 years old. I was born in a war-torn area. Right now I’m a web designer.
Q: What are your great memories?
A: My parents used to take us to hunt birds, climb trees, and play in the fields. For me it was like a holiday because we were going to have fun all day long. Those are my great memories.
Q: Does your childhood mean a lot to you?
A: Yes. As life was very hard, I used to work to help bring money in for the family. I spent my childhood working, with responsibilities beyond my age. However, it taught me to deal with problems all alone. I learnt to be independent.
Q: What changes would you like to make in your life?
A: If I could change something in my life, I’d change it so that my childhood could have taken place in another area. I would have loved to live with my family in freedom. Who cares whether we have much money, or whether we have a beautiful house? It doesn’t matter as long as I can live with my family and we are safe.
Q: How do you get along with your parents?
A: My parents supported me until I came of age. I want to give back what I’ve got. That’s our way. But I am working in another city. My only contact with my parents now is through the phone, but I hate using it. It filters(过滤)out your emotion and leaves your voice only. My deepest feelings should be passed through sight, hearing and touch.
【小题1】In Misbah’s childhood, .
| A．he was free from worry |
| B．he liked living in the countryside |
| C．he was fond of getting close to nature |
| D．he often spent holidays with his family |
| A．A colorful life. | B．A beautiful house. |
| C．Peace and freedom. | D．Money for his family. |
| A．By chatting on the Internet. | B．By calling them sometimes. |
| C．By paying weekly visits. | D．By writing them letters. |
| A．What was your childhood dream? |
| B．What is your biggest achievement? |
| C．What is your parents’ view of you? |
| D．What was your hardest experience in the war? |