The students are having their chemistry class.Miss Li is telling the children what water is like.After that,she asks her students some questions,"Boys and girls!What is water?Can you tell me?"She waits for a few minutes,but no one answers her.Then Miss Li asks again."Why don\t you ...
Miss Li is telling the children what water is like. After that she asks her students some questions and one of them is “Boys and girls! What is water? Can you tell me?” She waits for a few minutes but no one answers her. Then Miss Li asks again. “Why don’t you answer my ...
In the endthe teacher said, "Our water is getting dirtier and dirtier We should do something."(160 words)1.chemistry ['kemsti]n.化学2。to one's surprise 让某人感到吃惊的是……【例句】 To my surprise, She answered all the questions.让我感到吃惊的是,她回答了所有问题。3smell [sme] n....
1) Air is a mixture which contains about 78% of Nitrogen gases and 22% of Oxygen gas the remaining are Carbon Dioxide Water Vapour and other inert gases like Argon. * Inert gases me they are very stable very unreactive. 2) In daily life: Of course oxygen is necessary for ...
“I’m sorry, children,” said the teacher, “Our water is getting dirtier and dirtier. That’s a serious problem.”Answer the questions according to the passage.【小题1】Why didn’t the children answer the teacher’s question at first?
Miss Li is telling the children what water is like. After that, she asks her students some questions, and one of them is, “Boys and girls! What is water? Can you tell me?” She waits for a few minutes, but no one answers her. Then Miss Li asks again. “Why don’t you answer...
Is it an acid or base? We answer these questions and more in this short blog!Water makes up 71% of the Earth’s surface, up to 4% of our atmosphere, and about 60% of our body. It is the only substance on Earth that exists readily in all three states of matter: solid, liquid,...
Answer 1b is absolutely wrong. CaCO3 is insoluble in water while Ca(HCO3)2 soluble. Both of them do not react with Ca(OH)2. He/she gave a worse wer but titled the best wer. 原因是 ... ?(a)Dissove o samples into water. Add acidifried silver nitrate sloution and then...
kind of water? The water in the river behind my house is always black and it has a___smell.” Most of the children agreed___him. The boy went on saying: “My family and neighbors are___about the water. We wonder when and how we can stop the factories from___the river. “I’...
Try this awesome “Chemistry Unit 1 Practice Test Questions And Answers" quiz and let's see how well-versed you are in chemistry. The quiz is made to test your understanding of the fundamental concepts of chemistry. If you have a serious chemistry exam, test your knowledge and prepare well...