Ag để trong không khí bị biến thành màu đen do không khí bị nhiễm bẩn chất nào

Giúp mk câu 4 với. Mk cần gấp lắm.

II. Write a short paragraph (80-100 words) about a film that you like the most. You should use the following cues: - What film it is - When you watched it - What it was about - Why you like it Các bạn giúp mình với mình dg cần gấp

Giải giúp mình với ạ. Mình đang rất cần!!. Cảm ơn ạ!!

Sóng gợn tràng giang buồn điệp điệp, Con thuyền xuôi mái nước song song, Thuyền về nước lại, sầu trăm ngả; Củi một cành khô lạc mấy dòng. Vẻ đẹp cổ điển của đoạn thơ toát lên từ những yếu tố nào?

3. He can do a part to save the environment by buying recycled products.  If _____________________________________________________________________. 4. Putting garbage into the bins is one answer to minimizing pollution.  If _____________________________________________________________________. 5. Working too much will make you tired.  If _____________________________________________________________________. 6. The authorities are thinking of raising petrol prices. I will have to cycle to work.  If _____________________________________________________________________. 8. Chris will pass his exams, but he has to work hard.  If ____________________________________________________________________. 9. Ellen can borrow it, but she must give it back next week.  If _____________________________________________________________________. 10. We should take the map with us if we don’t want to lose our way in the forest.  If _____________________________________________________________________ giúp mình các câu trên nha thanks các bạn

The picture..............I bought was very valuable. a.which b.whom c.whose d.who

Bài 2. Dùng công thức nghiệm của phương trình bậc hai để giải các phương trình sau : a) 2x^2 - 7x + 3 = 0 b) 6x^2 + x + 5 = 0 c) 6x^2 + x - 5 = 0 d) 3x^2 + 5x + 2 = 0 e) y^2 - 8y + 16 = 0 f) 16z^2 + 24z + 9 = 0

II/ READING (4m) A. Complete the passage with the words form the box. Electricity new conserve hard recycled turn cardboard gasoline What can you do to take care of natural resources? You can reduce, reuse and recycle! For example.(1)……........ of the lights when you are not in the room and switch off the TV or other electrical appliances when you are not using. This will reduce the use of fossil fuel used to make (2)…………….. Ride your bike and walk more, to reduce the amount of (3) …………………used to transport you. You can reuse things. Things like plastic jugs, jars, paper, and bags can be used. Each time you reuse something, you (4) … ……….the natural resources that would have been used to make new ones. Finally, you can recycle. Recycle means reuse a natural resource or product to make something (5)…………….. It also means to collect and send these things for reuse. Items that can be easily (6) …… ………..include: glass, some plastics, paper, (7) ………., aluminum, and steel. Some plastics and metals are hard to recycle. They are often made for mixture of materials. Mixtures can be (8) ………………separate. Try to buy and use things that you can recycle.

2/Đường kính của một nguyên tử vàng là 3A 0 . Hãy tính độ dài của 1 tỉ nguyên tử vàng sắp xếp nối tiếp nhau. HỨA SẼ VOTE VÀ C.ƠN ĐẦY ĐỦ <3