题目

用括号内所给形容词的适当形式填空。   1. This book is as   (interesting) as that one.   2. Which is   (big), the sun or the earth?   3. Qomolangma is the   (tall) mountain in the world.   4. The weather in Fujian is   (warm) than that in Jilin in winter.   5. Miss Li is the   (popular) teacher of all. 答案：1. interesting 2. bigger  3. tallest 4. warmer 5. most popular一台汽油机飞轮的转速为2400r/min；则在1s内，汽油机完成________个冲程：汽油机的___________冲程是通过做功的方式增加燃料混合物的内能。