【判断题】用铈量法进行测定时,反应可在中性或碱性介质中进行。
【单选题】There is ____________ ' h ' and ____________ ' u ' in the word ' hour '. [ ]
【单选题】There is ________”h” and ________”u” in the word “hour”.
【单选题】There is ______ 'O' and ______ 'U' in the word 'hour'.
【简答题】Combien ça coûte? (1万5千欧)
【单选题】There is _____'u' and _____'r' in the word 'hour' [ ]
【单选题】There is ________'u' and ________'h' in the word 'hour'.
【单选题】听力原文: The terrible destruction of the World Trade Center, on September 11th 2001, has united the States in a way that they have not known for many years. It has also united most of the world. We will ...