1) In its most recent approach,the comet Crommelin passed the Earth at about the same distance and in about the same position,some 25 degrees above the horizon,(that Halley`s comet will pass) the next time it appears. A,括号部分 B，as Halley`s comet C, as will Halley`s comet D, as Halley`s comet will do 分不清楚B，C，D的区别，请教。
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发表于 2003-11-18 21:41:00
