Cân bằng phản ứng OXH khử bằng phương pháp thăng bằng e.

A. HCl + KMnO₄ —> KCl + MnCl₂ + Cl₂ + H₂O

B. SO₂ + KMnO₄ + H₂O —> K₂SO₄ + MnSO₄ + H₂SO₄

C. FeSO₄ + KMno₄ + H₂SO₄ —> K₂SO₄ + MnSO₄ + Fe₂(SO₄)₃ + H₂O

D. FeSO₄ + K₂Cr₂O7 + H₂SO₄ —> K₂SO₄ + Cr₂(SO₄)₃ + Fe₂(SO₄)₃  + H₂O

Dựa vào ngoại hình người chăn nuôi chọn lọc giống vật nuôi như thế nào ?

Choose the appropriate word from the box to complete each ofthe collocations

1. Flu is not a(n)...... illness for most people, but it can be life-threatening for the elderly who are weak.

2. The Smiths have a(n)..... diet, with lots of fruit and vegetables and only a few sweet things now and then.

3. Turn that music down! I've got a(n)...... headache!

4. I need to adopt a proper fitness program and......to it to get into shape again. I was in good...... a year ago but then I became a bit lazy.

5. Diseases which are..... now will be beaten one day if scientists continue to make progress with drugs and genetic science.

6. My aunt was..... ill when she was on holiday in South Africa.

7. I believe in....eating and I try to do exercise every day.

8. My doctor...... me a new drug to alleviate my backache. It worked!

9. To..... cancer is the most frightening experience, and people often need intense counseling to cope with it.

10. You can..... a cold if you go out wearing a T-shirt in winter.

Choose the appropriate word from the box to complete each ofthe collocations

1. Flu is not a(n)...... illness for most people, but it can be life-threatening for the elderly who are weak.

2. The Smiths have a(n)..... diet, with lots of fruit and vegetables and only a few sweet things now and then.

3. Turn that music down! I've got a(n)...... headache!

4. I need to adopt a proper fitness program and......to it to get into shape again. I was in good...... a year ago but then I became a bit lazy.

5. Diseases which are..... now will be beaten one day if scientists continue to make progress with drugs and genetic science.

6. My aunt was..... ill when she was on holiday in South Africa.

7. I believe in....eating and I try to do exercise every day.

8. My doctor...... me a new drug to alleviate my backache. It worked!

9. To..... cancer is the most frightening experience, and people often need intense counseling to cope with it.

10. You can..... a cold if you go out wearing a T-shirt in winter.

Reported speech with

1. “It was your fault. We missed the bus” they said to me

They blamed...........