单词:flap check valve
单词:flap check valve 相关文章
Part One 你听不懂的 As clean as a whistle 非常洁净,清白,空的,灵敏的 The police tried to find evidence related to his criminal behaviour but he was as clean as a whistle. Mary rides on the horse and jumps over the barrier as clean as a whistle. Th
Lesson 94 A Pair Of Bellows 第94课 一副风箱 Have you a pair of bellows at home? 你的家里是否有一副风箱呢? If you have, I hope that you will examine them carefully, and try to see how they are made, and to understand their use. 如果有
23. Necessity 1. It is necessary that you should learn from him. 2. It is not necessary for you to come to school on Sundays. 3. He needs to go and see his teacher. 4. I neednt go to work on holidays. 5. You dont need to know about chemistry and you
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今天我们要学的词是flap。 Flap在口语里,有争议、危机的意思。不久前,很多人莫名其妙地收到白宫的电子邮件,宣传奥巴马的医疗保健改革。The White House decided to make changes to its e-mail sign up
今天我们要学的词是flap。 Flap在口语里,有争议、危机的意思。不久前,很多人莫名其妙地收到白宫的电子邮件,宣传奥巴马的医疗保健改革。The White House decided to make changes to its e-mail signup