更多"Community cancer clusters are viewe"的相关试题:
[单项选择]Community cancer clusters are viewed quite differently by citizen activists than by epidemiologists. Environmentalists and concerned local residents, for instance, might immediately suspect environmental radiation as the culprit when a high incidence of cancer cases occurs near a nuclear facility. Epidemiologists, in contrast, would be more likely to say that the incidences were "inconclusive" or the result of pure chance. And when a breast cancer survivor, Lorraine Pace, mapped 20 breast cancer cases occurring in her West Islip, Long Island, community, her rudimentary research efforts were guided more by hope--that a specific environmental agent could be correlated with the cancers than by scientific method.
When epidemiologists study clusters of cancer cases and other noncontagious conditions such as birth defects or miscarriage, they take several variables into account, such as background rate (the number of people affected in the general population), cluster size, and specific
A. help reduce the incidence of breast cancer in future generations
B. improve her chances of surviving breast cancer
C. determine the cause responsible for her own breast cancer case
D. identify a particular cause for the breast cancer cases in West Islip
[填空题]People have different nutritional needs at different life stages.
[单项选择]
Different Tastes For Vacation
People like different kinds of vacations. Some go outside. Others like to stay at a hotel in an exciting city. They go shopping all day and go dancing all night. Or maybe they go sightseeing to places such as Disneyland, the Tai Mahan or the Louver.
Some people are bored with sightseeing trips. They don’t want to be "tourists". They want to have an adventure, to learn something and maybe help people too. How can they do this Some travel companies and environmental groups are planning special adventures. Sometimes these trips are difficult and full of hardships, but they’re a lot of fun. One organization, Earth Watch, sends small groups of volunteers to different parts of the world. Some volunteers spend two weeks and study the environment. Others work with animals. Others learn about people of the past.
Would you like an adventure in the Far North A team of volunteers is leaving from Mormons, Russia
A. a shopping center
B. a hotel
C. a dancing hall
D. a place of interest
[单项选择]Their style of playing football is utterly different.
A. barely
B. scarcely
C. hardly
D. totally
[单项选择]There are probably very few cases in which different races have lived in complete（）in a single country for long periods
A. success
B. revenge
C. harmony
D. conscience
[单项选择]According to Virginia Postrel, what is the difference between the rich in developed and developing countries A. The rich in developed countries are more concerned with enjoying their lives. B. The rich in developing countries live closer to poor people. C. The rich in developed countries have better taste in luxury goods.
[单项选择]It’s obvious that humans are fundamentally different from other animal species. It’s not so easy, though, to identify the traits that make human beings so special. Scientists realized long ago that other animals make tools, play jokes and even have a sense of justice and altruism—all things we once thought were unique to our species.
Now a paper in the journal Current Biology has added another behavior to the list of what other animals share with us—and this one isn’t quite so charming. After years of field observations in Uganda’s Kibale National Park, John Mitani of the University of Michigan and several colleagues have concluded that chimps wage war to conquer new territory.
"We already knew that chimps kill each other," says Mitani. "We’ve known this for a long time." What scientists didn’t know for certain, at least in cases in which groups of chimps banded together to kill others, was why. One hypothesis, advanced more than a decade ago by anthropologist Richar
A. held
B. challenged
C. proposed
D. confirmed
