Viet lai cau sao cho nghia khong doi:
Eating healthy foods is very important.
It is ___________________
I suggest having spaghetti and pizza tonight.
Let’s ________________________
You need to peel the onion and slice it.
The onion _________________________
My aunt has never tasted sushi before.
This is ________________________________
9876*0876=8651376
Cho duong tron (O; R) va (O'; r) tiep xuc ngoai tai A. Ke duong kinh AB cua (O) va AC cua (O'). H la trung diem BC. Day DE cua (O) vuong goc BC tai H. Goi F la giao diem CE voi duong tron (O').
a, Cm: AD vuong goc BD ; AF vuong goc FC.
b, Tinh HF.
Giup minh cau b voi.