Ong oi...may bay tu do cao 10000 feet ma roi xuong thi nghi no con nguyen ven nam chinh inh trong rung khong??? thu 2 la neu roi xuong rung thi cung da~ boc chay ma nguoi ta da~ tim duoc roi...dung noi chi do cao 10000 feet..50 feet cung thanh dong sat vung roi.

Bua sao co dang bai viet thi dung kien thuc 1 ti