theo mk thi ban len dang truyen

- conan

-doremon

- shin cau be but chi

bai 23 - tac dung tu, tac dung hoa hoc, tac dung sinh ly

quai

hanh phuc

ta co :AM=BM

suy ra: M nang giua A va B (1)

lai co: AM=MB (2)

tu (1) va (2) suy ra : M la chung diem cua AB (dpcm)

chuc moi nguoi tren hoc 24h thi dc diem cao nhu mk mong muon nha

cai dau

- dat trong la lop be mat toi xop cua vo trai dat, tren do cay trong co the sinh san va san xuat ra san pham

- can cu vao tri so pH nguoi ta chia thanh:

+ dat chua (pH nho hon 6,5)

+ dat trung tinh (pH = 6,6-7,5)

+ dat kiem ( pH lon hon 7,5)

dep qua

trong trot cung cap luong thuc-thuc pham cho con nguoi, thuc an cho chan nuoi, nguyen lieu cho cong nghiep va nong san de san xuat