下列叙述正确的是{"A":"H2\u70ed\u503c\u4e3a142.9 kJ\u00b7g-1\uff0c\u5219\u6c22\u6c14\u71c3\u70e7\u7684\u70ed\u5316\u5

题干

下列叙述正确的是

A：H₂热值为142.9 kJ·g^-1，则氢气燃烧的热化学方程式可表示为：
2H₂(g)+ O₂(g)= 2H₂O(l)△H=-285.8kJ·mol^-1

B：Al³^＋、Cu²^＋、SO₄²^－、F^－能在溶液中大量共存

C：硫酸亚铁溶液在空气中发生氧化反应：4 Fe²^＋＋ O₂＋4H⁺＝ 4 Fe³⁺＋2H₂O

D：已知K_SP(Ag₂SO₄)= 1.4×10^—⁵，则向100mL0.01mol·L^—¹的Na₂SO₄溶液中加入1 mL0.01mol·L^—¹的AgNO₃溶液，有白色沉淀生成

上一题下一题 0.0难度选择题更新时间:2020-03-03 09:13:33

C

假设你是Li Ming, 以下是你的美国笔友Tina发给你的一封电子邮件，请你根据该邮件内容给Tina回一封邮件。

From:	Tina
To:	Li Ming
Subject:	I am coming!
Hi Li Ming, How is everything? I'm very happy that the holidays are coming. I want to go to your hometown to visit you in September. Is this good? What's the weather like in your hometown? And what should I take with me? I know Mid-autumn Festival comes in September, and it is a very important festival for you celebrate it？I'm looking forward to your reply. Best wishes to your parents! Yours, Tina

要求:1）考生需按电子邮件格式来完成整个邮件；

2）邮件中不能出现真实姓名、校名等相关信息；

3）字数90~110。