【简答题】用方框中所给单词的适当形式填空,使短文正确、通顺、连贯。(每词限用一次。10分) come back, go out, pay back, say, find, last, return, lose, take, tell One day, my good friend Tom put his wallet in his bag. He put his bag in the classroom...
【简答题】在电闪雷鸣的雷雨天,空气中常会发生如下反应,①N 2 +O 2 →2NO,②2NO+O 2 →2NO 2 ,③3NO 2 +H 2 O→2X+NO. (1)反应①、②都属于______反应(填反应基本类型); (2)由N 2 →NO→NO 2 ,氮元素化合价逐步______(填“升高”或“降低”); (3)反应③中的X的化学式为______.
【单选题】对于基元反应:NO 2 + NO 3 → NO + O 2 + NO 2 ,可知
【简答题】根据所给中文或首字母填空,每空一词(每小题1分,共10分) 小题1:Keep trying and I’m sure you will ____________(成功)one day. 小题2:Sometimes being a good ____________(听者)is better than a speaker. 小题3:He _____________(提供) us with a lot...
【单选题】对于基元反应 NO 2 +NO 3 → NO +O 2 +NO 2 ,可以断论
【简答题】私( )家は名古屋です。森さんの家( )名古屋( )あります。
【单选题】对于基元反应 NO 2 + NO 3 → NO + O 2 + NO 2 ,可作断论:
【简答题】单词拼写, 用词的正确形式填空(共10小题每小题1分,共10分) 小题1:The most popular place for tourists is the Eiffel Tower, the famous ______ (象征) of Paris. 小题2:Have you ever _______________ (经历) a flood? 小题3:They can ___________ ...
【单选题】“十字法”选择臀部肌内注射部位时,向左或向右引水平线的起始点是
【单选题】用“十字法”选择臀部肌内注射部位时,向左或向右引水平线的起始点是