1.根据上文 How does water shortage affect people? 和下文中 may make them ill 可知,上文提到水短缺对人们的影响,下文提及水短缺会让人们生病,由此可知,空格处的内容与水短缺危害人们的健康有关。A项意为 "首先,它会损害他们的健康" ,承上启下,符合语境。故正确答案为A。2.根据上文 Just as our bodies...
How does the density of saltwater differ from that of freshwater? What causes hard water? How does water change into different states of matter? How to remove temporary hardness of water? What are the disadvantages of using hard water in medicine?
If you have hard water, you may wonder how hard it is. Measuring water hardness using a water harness scale helps you determine the type of softener you need.
Some people think they have the right to use as much fresh water as they want, while others believe governments should tightly control the use of fresh water as it is a limited resource. Discuss both views and give your opinion. Give reasons for your answer and include any relevant examples...
Water softeners operate on a simple principle: Calcium and magnesium ions in the water (hard water minerals) switch places with more desirable ions, usually sodium. The ion exchange process eliminates both of the problems of hard water because sodium doesn't precipitate out in pipes or react ba...
This time, it becomes very hard. Then, trucks bring the ice cream to shops.Want some ice cream?How does milk become ice cream?Cows need much food and water to make milk.On the farm For a healthy cow, it is common to produce about one hundred glasses of milk a day.Trucks pick up ...
[教案] 七年级下册《Reading 'Water talks' & Speak up 'How does water become rain?'》教学设计初中英语沪教版 对象七年级学生学校设计者一、教材分析:本单元围绕“水”的话题展开,贴近学生的生活,同时也是社会的热点。本课通过女孩Dora和“一滴水”之间的对话,让学生了解水从自然界进入家庭的过程,切实体会到...
Water, food, and___ (电) were hard to get and people began to wonder how long the disaster would last. 相关知识点: 试题来源: 解析 electricity 答案: electricity ,考查翻译填空,要翻译的部分为"电",做主语,所以用名词,表示抽象概念,为不可数名词,无复数,故填 electricity.水、食物和电都很难...
There was once a large bottle of fresh,clean water.Every drop of water in the bottle felt proud of being so clear and pure.Day after day they would congratulate each other on how clean and beautiful they were. But one day,one of the drops got bored with his clean ...
A. Because the English teacher didn t think Mike was studying hard in class. B. Because Mike answered the question wrong. C. Because Mike was bad at English. D. Because Mike had a fight with other students. 73. What...