Cho tam giác abc. Gọi m là trung điểm của đường cao ah, gọi d là giao điểm của cạnh ab với cm. chứng minh ab = 3ad

Sửa lỗi sai trong câu:

John, I think you should stop playing computer games and concentrate in your study.

Her letter caused him some...........( comfort)

Sửa lỗi sai trong câu:

1.Since the early 1900s, the most popular indoor sport played in america was basketball.

2. Some of us have to study their lessons more carefully if we expect to pass this exam.

3. Mrs. Stevens, along with her cousins from New Mexico, are planing to attend the party.

4. He gave me some very valuable advices on buying a new house.

1. The car went at full speed and crashed.....a big tree.

2. If it stays sunny........this, the clothes will dry.....a couple of hours.

3. Are you ashamed......your behavior............the party?

4..........mistake I opened my sister;s letter instead of my own.

5. He's gone .......China...... business.