If you’ve ever visited China, you are probably surprised by people drinking boiled water. Some might tell you boiling water removes harmful bacteria that could potentially make you sick. But this doesn't explain the practice of boiling bottled water!
书面表达。请以“火”为题写不少于40个词的短文Is fire important? Why?What can we do with fire?If house catches fire, what must we do?Fire 相关知识点: 试题来源: 解析 答案: 范文: Fire Fire is useful. We can use it to cook food and boil water. We can also use it to keep warm. ...
When we boil water, it turns into steam. Why does this happen? A. Water absorbs cold. B. Water releases heat. C. Water absorbs heat. D. Water is not affected by heat. 相关知识点: 试题来源: 解析 C。水煮沸变成蒸汽是因为水吸收了热量。A 选项水吸收冷错误;B 选项水释放热量不是变成蒸汽...
Why will water at the bottom of geyser not boil when it is at 100^{\circ}C? Why hot water bottles are used for fermentation? Why does a stream of water get narrower as it falls from a faucet? What is the specific of water? Why do bottles crack in the freezer with water? Why can...
Why do we like drinking water from plastic bottles? Some people think it is healthy and clean. Others drink bottled water because it's easy — you can carry it around with you. In hot countries, like Greece, we often buy bottles of cold water in the summer....
The heat generated by these rays is so immense that it can be used to boil water producing steam that drives a traditional turbine, which makes electricity. But when we say solar energy systems, we're usually talking about photovoltaics, or solar panels, which are the systems most commonly ...
, shall we? 一起做某事,好吗? You' d better do sth. 你最好做某事。[做一做]选择正确答案完成下列句子。1.flying kites in the park this Sunday? (Shall we / How about)2.passing me some salt? (Woul d you min d / Woul d you please)3. Why not plenty of boile d water? (drink ...
make juice.We need water to cook.-|||-When we're thirsty,we need to drink water.So we can't waste water.Don't leave the-|||-water running when you brush your teeth or wash your hands.Don't fill(装满)your-|||-coffee pot with too much water.Boil as much water as you need. ...
the next time you’re busy doing something entirely different than cooking in the room beside the kitchen, listen for this audible cue from nature to determine if the water is about to boil. Save yourself from a last-minute dash to the kitchen to shut the stove off and avoid an overflowed...
Why do pesticides(杀虫剂)fit into the picture of environmental disease We have seen that they now pollute soil, water and food, that they have the power to make our streams fishless and our gardens and woodlands silent and birdless. Man, however much he may like to pretend the contrary,...