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To _______ good relationships with your teachers and classmates, you should learn to be on good terms with them.
A. bring up B. add up C. keep up D. take up
查看习题详情和答案>>A mobile phone is no longer just a phone -- it is also a music player, video camera and personal organizer. And mobile phones with television programming are just around the corner. But the more functions cell phone manufacturers add, the greater the amount of power the phones use and the less practical running them on lithium (锂) batteries becomes -- so the race to find a viable alternative is on.
Two of the world's biggest electronics makers, Hitachi and Toshiba, are currently competing against each other to come up with an alternative, most likely to be micro fuel cells. The task has been set by Japan's second largest mobile phone provider, KDDI, which wants its customers to soon be able to use special television programming on their handsets, and has asked the two electronics companies to come up with a better power source. Hitomi Murakami, of KDDI, says battery-operated mobile phones cannot keep up with the new applications. "We're looking at various ways to expand content and services that we can provide to the people. And we don't want to have battery issues delaying us from doing that," he says.
Hitachi's Atsushi Morihara says it is a critical race for both of the companies as the resulting product will have a major impact on the mobile market in the future. "We are in competition and it's up to both of us to come up with a good product. A product that will satisfy KDDI's needs. I think I can go as far to say that the winner will take all."
Miniaturized direct methanol (甲醇) fuel cells are different batteries in that they create power instead of simply storing it. That power is made by new technology utilizing cheap methanol. If all gees to plan, come 2007, Japanese phone users will not use an electric charger to power their mobiles, they will instead carry a small bottle of methanol and with just a few squirts, they will have power for their phones. But the method has its downsides, including how passengers will be able to take small mounts of flammable methanol on airliners. Fumio Ueno of Toshiba says that once developed, the uses of miniaturized direct methanol fuel cells have endless possibilities.
The lithium batteries are becoming improper for the cell phone because ______.
A) there is a television in the phone C) it is inconvenient to use
B) it can't provide enough power D) people have found substitutes
According to the passage, Toshiba ______.
A) is in critical competition with KDDI
B) will probably beat its rival
C) attaches great importance to methanol fuel
D) is one of the largest battery provider
Which of the following is NOT the characteristic of methanol fuel?
A) Easy to catch fire. C) Portable.
B) Inexpensive. D) Available everywhere.
The best title for the passage is ______.
A) Search for better phone power.
B) Development of cell phone battery.
C) Competition between two electronic firms.
D) Advantage and disadvantage of methanol fuel.
查看习题详情和答案>>A recent study conducted by the Pine Street Foundation showed that a dog’s nose may have the ability to detect cancer. A dog’s nose, which was the “medical device” used as part of the research, is believed to be among the world’s most powerful olfactory(嗅觉的) sensors. The study was conducted with 169 subjects 55 of which had been diagnosed as having lung cancer, 31 have breast cancer and 83 control subjects——people without cancer. During the study, five professionally trained scent dogs were used to distinguish between the breath samples of cancer patients and those who were healthy. With an average of 90% accuracy, the research was deemed a success.
The Pine Street Foundation conducted its research on the belief that cancer cells give off a different type of metabolic(新陈代谢) waste product than normal cells. According to the study, the difference is so great that it can be detected by a dog’s sense of smell, including both early and late stages of the disease.
In the conclusion of the study the Pine Street Foundation said that even ordinary dogs may be trained to identify the presence of cancer with only a breath sample. The organization also said that dogs can recognize the disease with astonishing amount accuracy and, finally, that the dog’s detection was not hindered(妨碍) by the presence of age, smoking or stage of cancer.
The Pine Street Foundation plans to continue their research and is currently seeking funding to launch new studies.
If we want to add several different detecting examples to the passage, we should write them
__________.
A．between paragraph 1 and paragraph 2 B．between paragraph 2 and paragraph 3
C．between paragraph 3 and paragraph 4 D．before paragraph 1 or after paragraph 4
The best title for this passage might be ______.
A．Dogs may smell cancer B．Why dogs can smell cancer
C．A Study on dogs’ special ability D．A study on breast cancer
Dogs can smell cancer because ____________.
A．they can detect faster than man B．their sense of smell is very sensitive
C．dogs metabolize the food slowly D．patients give off bad smell
People can know from the passage _________.
A．all dogs can be used to smell cancer
B．it’s not easy to find out cancer in the early stage
C．most of the research experiments are successful
D．dogs detect cancer by breathing and feeling
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