题目

2015年9月20日7时01分，中国在太原卫星发射中心用全新研制的长征六号运载火箭，成功将20颗卫星发射升空，卫星顺利进入预定轨道，开创了我国一箭多星发射的新纪录．为提高火箭的运载能力，新型火箭使用的燃料为液氧煤油，液氧煤油燃烧时主要发生的反应的化学方程式为：X+14O29CO2+10H2O，X的化学式为（ ） A．CH4  B．C2H8  C．C9H20 D．C10H201  A: Hello. Lao Zhang! W____ (1)your hometown? B: My hometown is i______(2) Zhejiang. A: How do you go there for your h______(3)? B: I usually go home by t______(4). A: How l______(5) doe it take by train? B: A_____(6) ten hours. A: Well, it’s a long time. What a____(7) by plane? B: That’s very fast. About an hour. But it’s very expensive. A: Yes, of course. B: I like to travel by train. It’s c______(8) and safe. I can see a lot of things, too. A: Yes, you’re r____(9). Goodbye. B: See you l______(10).