A)The way we live will also be affected. We shall work shorter hours and have more time for leisure. There will even be no need

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问题 A)The way we live will also be affected. We shall work shorter hours and have more time for leisure. There will even be no need to travel to work.
   B) Even though asteroids(小行星) are very small and very faint, astronomers have learned a great deal about their sizes by using a variety of direct and indirect techniques. For example, it is known that the brightness of many asteroids varies periodically,

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答案A)我们的生活方式也会受到影响:工时将会缩短,闲暇增多,工作时甚至不必远行。 B)小行星既小又暗,但是天文学家们已经使用各种直接和间接的方法,弄清了有关它们的大小、形状等方面的情况。例如,我们已经知道,不少行星的亮度会发生周期性的变化。

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