题目

如图3所示为内燃机工作时的某冲程示意图，该冲程是 A. 吸气冲程   B. 压缩冲程  C. 做功冲程   D. 排气冲程 答案：D单词拼写根据句意、首字母、汉语提示或音标，完成单词。【1】 Taian is f_________ for Mount Tai.【2】The girl gave her seat to an old woman very _________(礼貌地).【3】 Don’t talk or laugh loudly. We should keep s_________ in the library.【4】Americans can hardly _________(避免) buying products made in China.【5】 Food safety _________(影响) our everyday life.【6】There are too many t_________ accidents on the road these days.【7】I often visit my r_________ and friends during the Spring Festival.【8】 France， German， Italy are E_________ countries.【9】 I used to be afraid of giving a speech in _________ .【10】The Internet is _________ used in most families in our country today.