题目: Could you tell me ______ use the newly-produced iPad can be of to our daily life? [ ]A. how B. what C. if D. whose 答案: 答案:B
题型:选择题 对下列物质燃烧的实验现象描述正确的是( )A.石蜡在氧气中燃烧时,有水和二氧化碳生成B.红磷燃烧产生大量白雾,放出大量的热C.铁丝在氧气中燃烧时,火星四射,有黑色固体生成D.木炭在空气中燃烧时,发出白光,生成无色无味的气体 查看答案
题型:选择题 The door is still closed. He _____ the key. A.musthavelostB.mustlose C.needhavelostD.canlost 查看答案