在2008年北京奥运场馆建设中,国家游泳中心“”的外墙体表面涂有一种新型塑料膜一ETFE[聚氟乙烯,化学式为;(C 2 H 2 F 2 ) n ],这种材料美观、耐用,且无须清理维护,可以使用15至20年.请回答下列问题:(1)ETFE由______种元素组成;ETFE中C、H、F元素的质量比为(填最简整数比)______.(2)ETFE中C元素的质量分数为______.(计算结果保留一位小数).
【单选题】The store in which the justice ofthe Peace's court was sitting smelled of cheese. The boy, crouched on his nailkeg at the back of the crowded room, knew he smelled cheese, and more: from where he sat ...
A.
Author: Ernest Hemingway; Work: Hills Like White Elephants
B.
Author: Ernest Hemingway; Work: Barn Burning
C.
Author: William Faulkner; Work: Barn Burning
D.
Author: William Faulkner; Work: Hills Like White Elephants
【简答题】“...So long as men can breathe, or eyes can see. So long lives this,and this gives life to thee.” 1). Identify the author and thework. 2 ) What is the implication and importance of this work?