什么是马力和扭力？
参考答案：
马力是引擎输出功率的常用单位，扭力则是指曲轴每回转所做的功。
根据所给提示，完成句子。每空一词，含缩略词。
小题1:Why not go to a concert with your friends? (改为同义句)
What _____ _____ to a concert with your friends?
小题2:He has ever known the answers (改为否定句)
He _______ known the answers _______.
小题3:I have learned English since I arrived here.(划线提问)
________ _________ have you learned English? .
小题4:She had few friends when she was 13, _____ _____? （改为反义疑问句）
小题5:我相信我的梦想将来会实现。
I believe my dream will _______ _____in the future.
股肿最大危险是：（）
A.局部疼痛
B.发热
C.肺栓塞
D.水肿
E.患肢增粗
