问题
单项选择题
哪种污染控制系统将空气压人排气流使污染物燃烧？（）
A.AIR（二次空气供给系统）
B.PCV（曲轴箱通风系统）
C.EGR（废气再循环系统）
D.TCS（增压控制系统）
答案
参考答案：A
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哪种污染控制系统将空气压人排气流使污染物燃烧？（）
A.AIR（二次空气供给系统）
B.PCV（曲轴箱通风系统）
C.EGR（废气再循环系统）
D.TCS（增压控制系统）
参考答案：A
| 短文填空。用方框中所给词的适当形式填空。 | |
parents give her a present-a new bike. Kate (2)_____________ it very much. (3)_____________ breakfast, Kate goes to school (4)_____________ the new bike. She sings songs on the way. She meets some (5) _____________. (6) _____________they see the new bike, they all say, "How nice the bike is!" Kate smiles and says "Thank you. It's my birthday today. This bike is the present (7)_____________ my (8)_____________.It can save (节省) me a (9)_____________time on the way."One of her classmates says, "That's good, Mary. When you have two (10)_____________,they can save you the whole (所有的) time on the way." |