已知氢化钠与水反应的方程式为:NaH+H2O=NaOH+H2↑,仿照此反应完成下 发布时间:2017-07-23 07:44 │ 来源:www.tikuol.com 题型:填空题 问题: 已知氢化钠与水反应的方程式为:NaH+H2O=NaOH+H2↑,仿照此反应完成下列化学方程式:CaH2和H2O 反应 。
题型:填空题 The number of people in the world ________ about 6 billion and large quantities of waste ________ each year.[ ]A. totals; has been producedB. totals; is producedC. totals; are producedD. total; are being produced 查看答案