| {{B}}Passage 2{{/B}} {{B}}Questions 30 to 32 are based on the passage you have just heard. {{/B}} |
| {{B}} Passage Two Questions 30 to 32 are based on the passage you have just heard.{{/B}} |
| When we accept the evidence of our unaided eyes and
describe the Sun as a yellow star, we have summed up the most important single
fact about it--at this moment in time. It appears probable, however, that
sunlight will be the color we know for only a negligibly (微不足道的) small part of
the Sun’s history. Stars, like individuals, age and change. As we look out into space, we see around us stars at all stages of evolution. There are faint blooded dwarfs so cool that their surface temperature is a mere 4,000 degrees Fahrenheit; there are scaring ghosts blazing at 100,000 degrees Fahrenheit and almost too hot to be seen, for the great part of their radia-tion is in the invisible ultraviolet range. Obviously, the "daylight" produced by any star depends on its temperatu A. Faint dwarf stars. B. The evolution cycle of the Sun. C. The Sun’s fuel problem. D. The dangers of invisible radiation. [单项选择]
A. They built a much lighter rocket. B. They built a much faster rocket. C. They loaded the rocket with enough fuel. D. They built a multistage rocket. [单项选择]
A. Place a tax on plastic bags. B. Start using paper bags. C. Start using reusable bags. D. Use biodegradable bags. 我来回答: 提交
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