皮皮学，免费搜题
登录
搜题
【简答题】
通过初中化学学习，我们掌握了一些化学知识，并能运用所学知识解答生产和生活中的一些问题． （1）新装修的房屋内空气中往往含有较多的甲醛（CH 2 O）等有毒物质，甲醛属于______（填“无机物”或“有机物”）．在搬入新装修房屋之前，除采取通风等措施外，还可利用“光触媒”技术，即在光和TiO 2 作催化剂的条件下，将甲醛与空气中的某物质反应生成无毒的二氧化碳和水，其反应的化学方程式是______． （2）日常生活中可用______除去热水瓶中的水垢． （3）ClO 2 作为一种新型自来水消毒剂．现用Cl 2 与NaClO 2 制取ClO 2 ，同时生成NaCl，该反应的化学方程式是______． （4）从课本中我们知道，金属开采时间是有限的．请你对金属资源的开发和利用提一条合理化的建议______．
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】What has the captain asked the passengers not to do during this time? [A] Order drinks. [B] Smoke cigarettes. [C] Use the toilets.
【简答题】Why has the captain asked the passengers to keep their seat belts on? [A] The plane is going to land. [B] The plane is going to take off. [C] The air might become very rough.
【单选题】关于骨盆平面下述哪项是错误的
A.
骨盆入口平面呈横椭圆形
B.
骨盆入口前后径与分娩机制相关
C.
骨盆中骨盆平面呈纵椭圆形,是骨盆最大平面
D.
中骨盆横径与分娩机制相关
E.
骨盆出口平面由两个在不同平面的三角形组成,出口横径与分娩机制相关
【简答题】The captain angrily seized him by the arm, and asked him what he meant by such bad ______(behave).
【单选题】Why has the captain asked the passengers to keep their seat belts on?
A.
The plane is going to land.
B.
The plane is going to take off.
C.
The air might become very rough.
【单选题】What has the captain asked the passengers not to do during this time?
A.
Order drinks.
B.
Smoke cigarettes.
C.
Use the toilets.
相关题目：