题目

阅读下面科普短文。2017年，我国在南海北部神狐海域进行的可燃冰试采获得成功。你对可燃冰有多少了解呢？什么是可燃冰？可燃冰外观像冰，主要含甲烷水合物（由甲烷分子和水分子组成），还含少量二氧化碳等气体。甲烷水合物的分子结构就像一个一个由若干水分子组成的笼子，每个笼子里“关”一个甲烷分子。可燃冰是怎样形成的？可燃冰的形成要满足三个条件：(1)温度不能太高。(2)压力要足够大。(3)要有甲烷气源。在上述三个条件都具备的Two thieves came to a house to steal something.They dug a hole in the wall of the house.There lived many mice in the house.The woman in the moonlight saw a mouse crawl（爬行）into the house.“Look！In comes one，”she said to the man in the house.The thief was so frightened that he hurriedly crawled out of the house and said to the one waiting outside，“She found me when I was just in.” But the thief outside didn’t believe him，so he said，“Let us two try to crawl into the house together.”At that time two mice happened to crawl into the house，too.The woman saw the mice and shouted，“In come two，catch them！” The two thieves were terribly frightened.The man in the house said，“You saw them come in but where are they？ I will catch them tonight.”The two thieves started running away at once.The two thieves wanted to make it clear whether they had been found or not the night before.The next day they acted as men selling sweet potatoes and came before the house.The man and the woman were ploughing in their fields.The rein（缰绳）broke and the woman came home for a rope.She saw two men selling sweet potatoes and wanted to buy some.She picked out two which looked like mice.At the time the man couldn’t wait for her any longer in the fields and he ran back from the fields to hurry her up.The woman showed the sweet potatoes to the man and said，“How they look like the two of last night.”The man said，“I asked you to fetch a rope，why don’t you hurry for it？”The two thieves ran away quickly without their sweet potatoes1.The two thieves failed to steal anything from the house because______.A.they were found outB.they were frightened by what they had heard in the houseC.they didn’t work together well with each otherD.mice stopped them from doing so2.From the last paragraph，we know that ______A.the two thieves were famous selling sweet potatoesB.the woman recognized the two thievesC.the woman pretended to know nothing about the two thieves and made fun of themD.the two thieves didn’t know that they were not found at all3.“______”is the best title for this passageA.Two Clever ThievesB.Terrible MiceC.Hit the Mark by a Fluke（歪打正着）D.A Clever Couple4.Which of the following statements is false？A.The two thieves not only failed to steal things but also lost their sweet potatoesB.Whenever they found mice，the people in the house would try to catch themC.The two thieves ran away at once，because they thought the woman had seen themD.The man let the woman go home for a rope，which would be used for catching the thieves