SummarizationRead each of the following short paragraphs and complete the phrase or sentence that expresses the main idea of the paragraph. The first letter of the missing word is given before the blank.Paragraph3.If spaceships were launched from space or from the moon, the absence of weight would permit the ships to be launched with great speed at reduced pressures. A relatively small explosion would be enough to send a ship off at a very fast rate. And, since there is no atmosphere in space as there is on earth, the spaceship would meet with no resistance.3. A_______from absence of weight in space.
【正确答案】：advantage
【题目解析】：P147
