(09乐山市)(5分)右图所示是高炉炼铁时高炉内的化学变化过程:认真阅读有关信息,回答下列问题:(1)将铁从铁矿石中还原出来的物质是(填化
列宁认为,既然我们无法直接过渡到社会主义,那么我们就“应该利用资本主义生产作为小生产和社会主义的中间环节”,为此而采取的政策是(
— Should Samthe office at 7:00 am? — No, that’s too early. He can get there before 8:30 am. A. reaches B. reached
下列事实能用勒夏特列原理解释的是A.实验室采用排饱和食盐水的方法收集Cl2 B.500℃左右的温度比室温更有利于合成氨反应C.H2、I2、HI平衡混合气体
Police: What's in your wallet? Owner: There some money and two tickets for today's e-sports competition. A. is B. was C. are
It’s ________ most beautiful furniture , by which I was struck at the first sight and I determined to take ________ possession of it some day . A. the ; ×
(6分)一堆小麦用8个编织袋来装,以每袋55千克为标准,超过的记作为正数,不足的记作为负数,现记录如下:(单位:千克)+2,,+2,+1,, 0,
下列卤代烃,既能发生水解,又能发生消去反应且只能得到一种单烯烃的是( )