更多"Scientists say they have{{U}} (36)"的相关试题:
[填空题]Scientists say they have{{U}} (36) {{/U}}evidence that jogging is good for people. This latest European research{{U}} (37) {{/U}}headline-making stories about people who die of a heart attack while running on the{{U}} (38) {{/U}}Danish researchers{{U}} (39) {{/U}}that those who jog regularly are far less likely to die prematurely than those who do not. Their work,{{U}} (40) {{/U}}in last Saturday’s issue of the British Medical{{U}} (41) {{/U}}, sifted through data from a Copenhagen heart study. The study covered more than 4,500 men{{U}} (42) {{/U}}20 to 79 with no history of cardiac (心脏的) problems.
The group was followed from mid-1970s until November 1998. It is found that{{U}} (43) {{/U}}joggers were nearly two and a half times less likely to die prematurely than non-joggers.{{U}} (44) {{/U}}, including smoking, drinking, diabetes, education and household income to try to explain this big difference in mortality.{{U}} (45) {{/U}}.{{U}} (46) {{/U}}.
[填空题]
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 confor