更多"The technology news site CNET has c"的相关试题:
[单项选择]The technology news site CNET has compiled two interesting lists showing which cellphones give off the most and the least radiation.
In publishing the information, CNET editors note the data aren’t meant to imply that cellphone radiation poses a risk, nor is it meant to say that the phones are safe. As I recently reported in my Well column last week, the data on cellphone safety are mixed, although a few recent international studies have suggested a link with three types of brain tumors. The Food and Drug Administration also says there’s not enough information to determine conclusively whether cellphones are safe or unsafe.
The charts focus on the specific absorption rates or SAR, of a cellphone, which is a way of measuring the quantity of radio frequency energy that is absorbed by the body, according to CNET.
For a phone to pass F. C. C, certification, that phone’s maximum SAR level must be less than 1.6 W/kg (watts per kilogram). In Europe, the level is capped at
A. Cellphones cause brain tumors.
B. Cellphones are safe.
C. Cellphones have both good and bad effects on human body.
D. More information is needed to determine cellphone’s influenc
[单项选择]The physical distribution of products has two primary aspects: transportation and storage. Both aspects are highly developed and specialized phases of marketing. The costs of both transporting and storing are built into the prices of products. Transportation can be by truck, railways, ship, or barge. For some items, such as exotic plants and flowers, or when rapid delivery is essential, air freight may be used. Storage, or warehousing, is a necessary function because production and consumption of goods rarely match: items generally are not sold as quickly as they are made. Inventories build up, both in warehouses and at retail establishments, before the foods are sold. The transportation function is involved in bringing goods to a warehouse and taking them from it to retail stores. Storage performs the service of stabilizing market price. If, for example, no agricultural product could be stored, all food would have to be put on the market immediately. This would, of course, create a glut and lower prices drastically. There would be an immediate benefit to consumers, but in the long run they would suffer. Farmers, because of low prices, would be forced off the land, and the amount of food produced would decrease. This, in turn, would raise consumer prices. Warehouses for storage are of several types. Private warehouses are owned by manufacturers. Public warehouses, in spite of their name, are privately owned facilities, but they are independent of manufacturer ownership. General-merchandise warehouses store a great variety of products. Cold-storage warehouses store perishable goods, especially food products. Grain elevators are a kind of warehouse used to keep wheat and other grains from spoiling. A bonded warehouse is one that stores foods, frequently imported, on which taxes must be paid before they are sold. Cigarettes and alcoholic beverages are common examples. The distribution center is a more recently developed kind of warehouse. Many large companies have several manufacturing plants, sometimes located outside the country. Each plant does not make every company product but specializes in one or more of them. The distribution center allows a manufacturer to bring together all product lines in one place. Its purpose is to minimize storage and to ease the flow of goods from manufacturers to retailers rather than build up extensive inventories. It reduces costs by speeding up product turnover. Very large corporations will have several distribution centers regionally or internationally based.The main subject of this passage is______.
A. transportation and storage
B. storage of products
C. distribution center
D. two main aspects of product distribution
[单项选择]Scarborough General Hospital has two （） for certified X-ray technicians to start immediately.
A. open
B. opener
C. openings
D. openness
[单项选择]A certain species of bird has two basic varieties, crested and noncrested. The birds, which generally live in flocks that contain only crested or only noncrested birds, tend to select mates of the same variety as themselves. However, if a bird that is raised in a flock in which all other members are crested is later moved to a mixed flock, then that bird—whether crested or noncrested—is likely to select a crested mate. This fact indicates that the birds’ preference for crested or noncrested mates is learned rather than genetically determined. Which one of the following, if true, provides the most support for the argument
A. Birds of other species also tend to show preferences for mates that have one or another specific physical feature.
B. In general there are few behavioral differences between the crested and noncrested birds of the species.
C. Both the crested and noncrested birds of the species tend to select mates that are similar to themselves in size and age.
D. If a crested bird of the species is raised in captivity apart form other birds and is later moved to a mixed flock, that bird is likely to select a crested mate.
E. (E) If a bird of the species is raised in a flock that contains both crested and noncrested birds, that bird shows no preference for one variety or the other in its selection of a mate.
[单项选择]Holland has two-thirds the inhabitants of the state of New York, ______ Holland.
A. that size is four times of
B. that is four times the size of
C. which size is four times of
D. which is four times the size of
[单项选择]He has two Chinese English dictionaries,（）were bought last week.
A. two of which
B. both of which
C. both of them
D. all of them
[简答题]The word "happy" has two different types of antonyms at the same time, one being negative and the other opposite. What are they
[单项选择]Everything has two sides. One side of SARS is already clear. It is a deadly disease, which causes fear. There were 2,601 cases (病例) recorded on the Chinese mainland on April 24, according to government report. 115 people have died and numbers keep rising.
But, there is another side.
SARS is a reminder(提醒) of how fragile life can be. Suddenly, it’s not just the old people who are thinking about death. Everyone now realizes there might not always be a tomorrow.
Wang Xinying, a student in Taiyuan, Shanxi Province came into contact (接触) with a suspected(疑似) SARS patient in mid-April. He was told to stay at home for at least two weeks. "Watching TV about more and more SARS patients dying, I never knew that death could be so close. Life is valuable (珍贵的) and I’m going to treasure(珍惜) every single day," he said.
SARS teaches people to be grateful, both for their own lives and for others. Doctors and nurses, for example, have to spend all their time with infected (被感染的) pat
A. Right
B. Wrong
C. Doesn’t Say
