các bạn giúp mình vs mình đang cần rất gấp
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JE
1 tháng 8 2016
Có phải là chia nó thành các nhóm k nhỉ? Vd như nhóm kim loại , ôxit axit , ôxit bazơ , phi kim , axit , bazơ và muối
1 tháng 11 2016
trong nhóm tui cx có một đứa giả tạo ấy, bình thường thì đối xử tốt vs mọi người, sau lưng thì nói xấu người khác, bla bla bla,..., cậu cứ kệ tụi nó đi, đừng quan tâm mấy cái lũ ngu gì hết cho mệt người, cứ coi như mình chưa biết gì đi
2 tháng 11 2016
+mactuen, nhà văn Mỹ có nói:" k nên cãi nhau với kẻ ngu vì chúng sẽ kéo ta bằng trình độ của chúng và thắng ta bằng kinh nghiệm"
+ qua nội dung bn viết mk nghĩ bn nên suy nghĩ, " tội nghiệp" k tạo nên tình bn tốt, cứ nể tình mà k nói rõ sự thật chỉ làm hại bn mk,phải rõ ràng đúng ,sai bn à
AK
4
1 tháng 5 2019
The energy generated from natural sources such as the sun, wind, rain, and tides is called renewable energy. They are plentiful and can be generated again and again. They also have low carbon emissions so they are considered green and environment-friendly. Moreover, using renewable energy can reduce your electricity bills. Unfortunately, solar energy can be only used during the daytime but not during night or the rainy season. Geothermal energy also can bring toxic chemicals beneath the earth's surface to the top and can create environmental changes.
Non-renewable energy is the energy taken from other sources that are available on earth.They are limited and will run out in the future. They can't be re-generated in a short time.Fossil fuels - natural gas, oil and coal - are examples of them. They are cheap and easy to use. However, when burnt, they release toxic gases in the air so they cause serious environmental changes such as global warming. And the important thing is that non-renewable sources will expire someday.
LN
1 tháng 5 2019
No longer is solar energy a fringe energy source, useful only in sunny regions or for charging portable electronics. Thanks to the huge drop in solar component costs over the last few decades and several innovations in materials and production, solar is rapidly becoming an accessible and affordable option for home power.
The cost of solar modules has fallen some 75 percent just since the end of 2009, the International Renewable Energy Agency reports. Solar energy has hit grid parity in a number of markets, including many of the top cities in the U.S. where solar electricity beats out grid prices. And because of new solar financing options such as solar leasing, more home and business owners can find a solar solution that works for them. For those who can't have solar on their own roof but still want the benefits of clean electricity from the sun, community solar programs are an accessible and affordable option.
VK
4 tháng 10 2019
15 câu hỏi liên quan đến sức khỏe bằng tiếng anh trả lời bằng tiếng anh
1. How are you? Very well, thank you. And you?
2. How are you today? Very well, thank you. And you?
3. How do you do? I’m fine, thanks. How are you?
4. How do you doing? Fine. Thank you
5. How have you been doing? I’m good, thanks. How about you?
6.How have you been? I’m good, thanks. How about you?
7. Everything OK? You look so tired ? Not too bad
8.. How are things? I’m doing great, thank you
9.How’s things? I’m doing great, thank you
10. How’s it going? Okay
11. How are you getting on? I’m feeling good now. Thanks for asking
12. What have you been up to? I'm still very strong
13. I hope everthing’s okay? I'm okay
14. Are you not feeling well? I'm ok
15. What’s wrong with you? Nothing happened to me
nhũng điều cần thiết cho sức khỏe bằng tiếng anh
1. Health is not only about physical matters, physical status but pure biological meaning, including mental health, life skills to adapt to social community and nature.
2. Take care of your health right from the womb to the age of birth, your child, prepare for the leap from adolescence to adolescence, through middle-aged work most effectively to the age of tri destiny to have a happy and healthy elderly life. Each of these stages has its own biological characteriss that need to be kept in full care, absolutely not underestimated at any age.
3. Conscious self-training to create a basic health foundation, a stable and dynamic mental state, suitable for age and nature, without relying on physical comfort and conditions. activities, nutrition, use of functional foods medicine.
4. Prevention is better than cure. When you are healthy, you must anipate and prevent the risk of proactive disease avoidance is the most effective economic problem.
5. Everyone must have health insurance, in addition to the subjects under the policy, need to buy voluntary insurance to be assured when paying hospital fees. People with middle income and above should consider buying additional life insurance.
6. Take advantage of online information and advice to have a basic understanding, consider appropriate options for illness and other conditions, avoid overcrowding at central level hospitals, bring about hospitalization conditions Best for sick and close relatives to take care of.
7. Irrespective of medical examination and treatment establishments and administrative services according to the classification of administrative properties, only according to the sole criterion is where the best quality of medical examination and treatment and support services come.
8. Respect every physician regardless of specialty, function of each stage of medical examination and treatment. The old mistake is to only value dissectors, while anesthetists, resuscitators, post-operative care watchers, or physicians who only provide counseling and sanitation for epidemic prevention are often overlooked. This is a disadvantage for patients because a right advice to avoid unnecessary surgery will benefit many patients and their relatives.
9. Appreciate and spend appropriately on family meals. Eating at a restaurant or bar is just a means of communication or a context of time conditions, especially in the difficult time on food hygiene and safety.
10. When sick, accident is the time to be alert to clear all the problems in the story of work money ... to regain peace, love to help each other overcome the tribulation.
mình nha mình mãi mới trả lời xong đó ≥^.^≤
mk biết nhưng mk k biết lm sơ đồ
a) cacbonic + canxi hiđroxit --> canxi cacbonat + nước
b) hiđro peoxit --> nước+ khí oxi
c) canxi cacbonat --to--> canxi oxit + cacbonic