cho nửa đường tròn O đường kính AB. Hai tiếp tuyến Ax,By.Trên Ax,By lấy C,D.Biết AC+BD=CD. CMR a.COD=90° b.Đường thẳng AB là tiếp tuyến đường tròn ngoại tiếp tam giác COD còn CD là tiếp tuyến của đường tròn O

Cali: Đói thì tìm j mà ăn Nl: hình nền màu đen chữ màu trắng

B1: lập dàn ý cho đề sau: Từ đoạn trích "tức nước vỡ bờ" em hãy cho biết giá trị nhân đạo mà nhà văn gửi gắm

Lập trình free pascal Làm gấp giúp mik vs ạ

Một người đi xe đạp trong 30 phút với vận tốc 30 km/h. Hỏi quãng đường đi được là bao nhiêu km

Cho phương trình x^2+2(m+1)x+m^2+2=0. Tìm m để phương trình có 2 nghiệm phân biệt x1;x2

My gấp được số bông hoa là số nhỏ nhất có hai chữ số pha gấp được 1phần 2 số bông hoa của my

I. Fill ONE suitable word into each of numbered blanks in the passage. Australia is a big country, but nearly all Australians live near the sea. On hot summer days, you can see thousands of people at the beach. Many beaches have waves (1)______ are very high. These large waves are known as surf and the people who ride them are called surfers. Surfing is a skill, and it needs learning. Don’t (2)______ to be able to surf properly the (3)______ time you try. However, by practising a few times you will learn (4)______ to do it. Surfing is not a new sport. Perhaps its origins need explaining. It started hundreds (5)______ years ago in Hawaii. Men swam (6)______ to sea to catch fish and found they could come back to land very quickly by riding the waves. These first surfers did not (7)______ a board. They were “body surfers”. Many people (8)______ do this type of surfing today. After a while people started to use boards and rode the waves by lying, kneeling, or standing (9)______ them. These first surfboards were made of wood and the water made them rot after a while. Today, surfboards are made of plastic or fiberglass (10)______.

1 BÀI MÀ 60 ĐIỂM !!!!!!!!!!!!!!!!!!!!!!!

Rewrite the sentences with the same meanings. 26. “ Do you still live in Hanoi now?” Nam said to me. ---> Nam asked me_..... 27. Does your brother use the Internet every day? ---> Your brother___________________________________________________________________ 28. They will have to change the day of the meeting again. ---> The day _______________________________________________________________________ 29. The boy can’t speak to the visitors because he doesn’t know French. ---> The boy wishes _________________________________________________________________ 30. We no longer write to each other very often now. --> We used ______________________________________________________________________ 31. My parents have given me an interesting book. --> I ....................