A 16-year-old boy finds himself on a boat in the Pacific Ocean after escaping a shipwreck(海难). Even worse, he is left with a huge tiger for company. But he manages to survive after 227 days of f
His aunt wants to get him _______ the radio, but he has had it _______ already. A. repair, repair B. to repair, repair C. repaired, to repair D. to repair, repaired
中，
是
，交AC所在直线于点D，若BE=x，
的面积为y，则y与x的函数图象大致是 
