问题
填空题
根据句意及汉语提示，用所给词的适当形式填空。（每空一词）
(1) My ______ (朋友们) like dumplings a lot.
(2) ______ (谁的) dress is this? Is this your dress, Danny?
(3) I ______ (做) my homework at school.
(4) My finger ______ (疼痛).
(5) May I borrow ______ (你的) umbrella?
答案
(1) friends (2) whose (3)do (4)hurts (5)your
，若输电线中因生热而损失的功率为输送功率的 4%，求：