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物质的化学变化

> 下列物质的化学式、化学名称和俗称相一致的是 [ ] A. NaOH 氢氧化钠纯碱 B. NaHCO 3 碳酸氢钠苏打 C. C 2H 5OH 乙醇酒精 D. CaO 氧化钙熟石灰

问题：

发布时间：2024-09-13

下列物质的化学式、化学名称和俗称相一致的是
[ ]
A. NaOH 氢氧化钠纯碱
B. NaHCO ₃碳酸氢钠苏打
C. C ₂H ₅OH 乙醇酒精
D. CaO 氧化钙熟石灰

参考答案：

提问用户：sM***vFe

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1 阅读理解。 Being safe in your everyday life needs knowledge (知识). If you remember the following information, your life will be much safer. ●Always notice the environment around you. You shouldn"t walk alone outside. Make sure where the public phones are. If anything dangerous happens, you can find them easily. ●Your bag should be carried towards the front of your body instead of putting on your back. When a bus is full of people, it is easy enough for a thief to take away the things in the bag on your back. ●If you are followed by someone you don"t know, cross the street and go to the other way, let the person understand that you know he or she is after you. Next, don"t go home at once. You are safer in the street than you are alone in your home or in a life (电梯) ●If you have to take a bus to a place far away, try to get to the stop a few minutes earlier before the bus leaves. This stops other people from studying you. On the bus, don"t sit alone. Sit behind the driver or with other people. Don"t sleep. l. Which of the following is Not safe when you are out? A. Go home alone late at night. B. Make sure where the public phones are. C. Don"t get to the bus stop too early. D. Always notice the environment around you. 2. You"d better put your bag _____ when there are too many people on a bus. A. on your back B. beside you C. in front of you D. behind the driver 3. When you are followed by someone on your way home, you should _____ to make yourself safe. A. run home B. find a lift and go in C. turn back and walk towards him or her at once D. cross the street and go to the other way 4. When you take a bus alone, it"s safe for you _____. A. to sit behind the driver or with other people, but not to sleep B. to talk with the driver C. to call your friends D. to get off the bus at once 5. What can you learn from the text? A. How to notice the environment around you. B. How to be safe in your everyday life. C. How to cross the street. D. How to use the public phones.
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下列物质的化学式、化学名称和俗称相一致的是 [ ] A. NaOH 氢氧化钠 纯碱 B. NaHCO 3 碳酸氢钠 苏打 C. C 2H 5OH 乙醇 酒精 D. CaO 氧化钙 熟石灰

可能感兴趣的题目：

下列物质的化学式、化学名称和俗称相一致的是
[ ]
A. NaOH 氢氧化钠纯碱
B. NaHCO ₃碳酸氢钠苏打
C. C ₂H ₅OH 乙醇酒精
D. CaO 氧化钙熟石灰