氧气的性质
（1）物理性质：通常状况下，氧气是一种____ 气体，密度比空气略大，____ 溶于水，在一定条件下，可变为____色液体或____ 状固体．工业生产的氧气，一般加压贮存在钢瓶中．
（2）化学性质：
①氧气能使带火星的木条____ ，说明氧气能____ ．
②硫在空气中燃烧发出____ 火焰，在氧气里燃烧是发出____ 火焰，生成有____ 气味的气体，反应文字表达式为____ ．
③铁在氧气中剧烈燃烧，火星四射，放热，生成____ 色固体，反应文字表达式为____ ．
根据句子意思，用括号中所给汉语提示或英语单词的适当形式填空。(每空一词)①The____ of this mountain is 5540 meters. (高度)②If you want to come, please let us know as soon as ____ (可能的).③There are ____ of people by the sea. (千)④The more careful you are, the fewer ____ you'll make. (错误)⑤Mum is always busy. Last week she ____ three meetings. (出席)⑥This piece of advice is very____ . I'll take it. (use).⑦Bad weather sometimes causes____ (nature) disasters.⑧____ , I could get the last plane ticket to the USA. (luck)⑨The twin brothers like keeping secrets to ____ . (they)⑩The radio says it will be much____ (rain) tomorrow.
一个数的16倍是43.2，这个数的30倍是____
____ the milk ____ the blender.
