Any good mystery must eventually
uncover a villain, and in a recent documentary, "Who Killed the Electric Car ",
the filmmakers duly pointed the finger at General Motors. The{{U}} (62)
{{/U}}is not so simple, but there is little doubt that when GM pulled the
plug on its EV1 battery-powered car a decade ago, other{{U}} (63)
{{/U}}followed the Giant carmaker’s lead. Yet GM has now{{U}} (64) {{/U}}its enthusiasm for electric vehicles — or at least for their close cousins, hybrid cars (混合动力汽车). At the upcoming auto show, the company is expected to{{U}} (65) {{/U}}a prototype that overtakes existing hybrids,{{U}} (66) {{/U}}Toyota’s Pruis. Today’s hybrids capture energy normally{{U}} (67) {{/U}}during braking and coasting and use it to power an electric motor that can provide extra bursts of{{U}} (68) {{/U}}when needed. The P A. optimistic B. excited C. confident D. cautious [单项选择]It is a must to preface any discussion of atoms by paying homage to Democritus, an Ionian philosopher of the fifth century B. C., the earliest known proponent of an atomic theory. Though Democritus’ idea were in many ways strikingly modern and were promulgated (传播) by his more celebrated successor Epicurus, his theory never gained wide acceptance in Greek thought. It had largely been forgotten by the time of the late Renaissance rebirth of science. While the dramatic rise of the atomic theory over the last century and a half deems to have vindicated (证明……正确) Democritus, only the Greek name atom ("indivisible") remains to establish his claim as the father of the theory.
Nonetheless, Democritus’ thinking contained the seed of the idea that has dominated the twentieth-century physical thought. He was one of the first to perceive that nature on a sufficiently small scale might be qualitatively different in a striking way from the world of our ordinary experience. And he was the firs A. popular B. complicated C. groundbreaking D. baseless 我来回答: 提交
|