更多"For about three centuries we have b"的相关试题:
[单项选择]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 interaction, 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 on the issue of nuclear energy. The principal discoveries in this century, all in all, are the glimpses of the depth of our ignorance about nature. Things that used to seem c
A. Scientific experiments in the past three hundred years have produced many valuable items.
B. For three hundred years there have been people holding hostile attitude toward science.
C. For centuries scientific discoveries have been hailed by the human world unanimously.
D. Three hundred years is not long enough to settle back for critical appraisal of the scientific method.
[简答题](翻译题)Three proposals have been put forth, but I don’t agree to all these proposals.
[单项选择]
As long as we have been on earth, we have used
the sea around us. We take from the ocean and we give (41)
it. We take fish from the ocean — millions of
kilograms of fish, every year, to (42) millions of people. We
even use (43) bones for fertilizer and meal.
We take (44) from the ocean. One way to get salt
(45) sea water in a shallow basin and leave it (46)
it evaporates. Along with salt, other minerals are left after
evaporation — iodine (碘), magnesium(镁), and bromine(溴), to (47)
a few. Much gold and silver drift (48)
in the waters of the sea, too. But the sea does not (49)
them up by simple evaporation. Other gifts from the
sea are pearls, sponges(海绵), and seaweed. Pearls become jewelry. (50)
sponges become cleaning aids. Seaweed becomes (51) of many
kinds — A. in B. up C. to D. for
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