2016年3月22日是第二十四届“世界水日”．下列说法正确的是_刷题宝

题干

2016年3月22日是第二十四届“世界水日”．下列说法正确的是（）

A：自然界的水都是纯净物

B：生活中通过煮沸水可以降低水的硬度

C：水（H₂O）是由2个氢原子和1个氧原子组成

D：水电解时所生成氢气和氧气的质量比为2：1

上一题下一题 0.0难度选择题更新时间:2011-11-26 10:10:16

答案(点此获取答案解析）

B

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下表是拉动经济增长的三驾马车——投资、出口、消费及其实现方式，其组合正确的是

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阅读下列短文，从每题所给的四个选项（A/B/C/D）中选出最佳选项。

Ask Dr. Emily for Advice on Your Problem

Dear Dr. Emily,
I started Grade 7 this year and we have this project in our school: everyone in Grade 7 gets a little partner（伙伴）. It means that we each have a partner from Grade 1. We need to take them to school and help them know more about the school. I ‘m OK with children but I just can't make friends with them. All my classmates do better than me. I have a bad temper and I don't want to scare them away. I need some advice.
Kirsty,12

Dear Kirsty,
I think what your school does is a great way to learn how to take care of others. First, remember that the children from Grade 1 are much younger than you. They don't know as much as you. Second, remember not to be angry when things go wrong. You may scare them. Last but not least, keep in mind that kids love to try new things. So try to teach them something new and they can be interested in it. For example, you can play new interesting games with them. I hope things will be better for you soon.
Emily

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下列关于责任的说法，你认为正确的是（）

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读“我国南方部分省区轮廓图”，回答问题有误的是（）

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