| Centuries ago, man discovered that
removing moisture from food helps to preserve it, and that the easiest way to do
this is to expose the food to sun and wind. In this way the North American
Indians produce pemmican (dried meat ground into powder and made into cakes),
the Scandinavians make stockfish and the Arabs dried dates and "apricot
leather". All foods including water — cabbage and other leaf vegetables contains as much as 93% water, potatoes and other root vegetables 80%, lean meat 75% and fish, anything from 80% to 60%, depending on how fatty it is. If this water is removed, the activity of the bacteria which cause food to go bad is checked. Fruit is sun-dried in Asia Minor, Greece, Spain and other Mediterranean countries, and also in California, South Africa and Australia. The methods used vary, but in general, A. is the one most commonly used today B. was invented by the American Indians C. has been known for hundreds of years D. tends to be unhygienic [单项选择]
TEXT B For about three centuries we have been doing science, trying science out, using science for the construction of what we call modern civilization. Every dispensable item of contemporary technology, from canal locks to dial telephones to penicillin, was pieced together from the analysis of data provided by one or another series of scientific experiments. Three hundred years seems a long time for testing a new approach to human development long enough to settle back for critical appraisal of the scientific method, maybe even long enough to vote on whether to go on with it or not. There is an argument. Voices have been raised in protest since the beginning, rising in pitch and violence in the nineteenth century during the early stages of the industrial revolution, summoning urgent crowds into the streets any day these days on the issue of nuclear energy. Give it back, say some of the voices, it doesn’t really work, we’d tried A. Many valuable items were produced in the past. B. Man supports scientific progress unanimously. C. Some held hostile attitude toward science in the past. D. Three hundred years is not long enough in science. [单项选择]
{{B}}TEXT B{{/B}} "The US economy is rapidly deteriorating," says Mr. Grannis. "The odds of a recession are now very high, perhaps by the end of the year." There are already some signs that important pillars are weakening. Consumer confidence has fallen for the past two months. The housing sector, which has been buoyant, is starting to sink. Corporate profits are failing. Some analysts are especially concerned over the sharp fall of commodity prices. They believe it represents the threat of deflation, it could cause a global slowdown. "The Fed will have to act forcefully to arrest the deflationary forces," says Robert Lamorte, chairman of Behavioral Economics, a consulting firm in San Diego. But others counter that the central bank doesn’t need to intervene. They argue the Fed should wait to see real data before acting. "The fundamentals are better than the stock market reflects", says Peter Kretzmer, an economist at Nations-B A. To pacify the market. B. To make a speech on American economy. C. To intervene. D. To cooperate with Russian to pursue sustainable development. [单项选择]It takes Earth about 365 days ______ one orbit around the sun.
A. to complete B. complete C. completing D. being completed [填空题]
A.twenty 我来回答: 提交
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