更多"Scientists have a clear explanation"的相关试题:
[填空题]Scientists have a clear explanation for the existence of music.
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Scientists say they have achieved small-scale nuclear fusion in a tabletop experiment, using tried and true techniques that are expected to generate far less controversy than past such claims.
This latest experiment relied on a tiny crystal to generate a strong electric field. While the energy created was too small to harness cheap fusion power, the technique could have potential uses in medicine, spacecraft propulsion, the oil drilling industry and homeland security, said Seth Putterman, a physicist at the University of California at Los Angeles.
Putterman and his colleagues at UCLA, Brian Naranjo and Jim Gimzewski, report their results in Thursday’s issue of the journal Nature.
41. Held up to ridicule
Previous claims of tabletop fusion have been met with skepticism and even derision by physicists. ( )
42. Sound theoretical basis
Fusion experts said the UCLA experiment will face far less skepticism because it co
[填空题]Scientists in India have discovered a way to make bamboo plants produce flowers in laboratory. The British (36) Nature recently reported the (37) event. In the wild it can take as long as one hundred and twenty years for some kinds of bamboo to flower, and after the plant (38) its seeds it dies. The bamboo plant is used in many different ways. But because it takes so long to produce seeds, scientists never (39) it a traditional farm crop. The recent (40) in India may change that. The (41) was done at the National Chemical Laboratory in India. Three scientists cut two hundred pieces from two different kinds of bamboo plants; each was a few (42) long. The tiny cuttings were placed in the (43) of coconuts milk, plant-growth hormone and other nutrients. Just a few weeks later, flowers began to appear. (44) . Two weeks after that the plants began to produce seeds. (45) . One of them had not put the b