在Fe2O3中,铁元素与氧元素的质量比是( )
A:2:3
B:7:3
C:7:2
D:3:2
阅读下面的文言文,完成下列小题。
【甲】陈胜、吴广乃谋曰:“今亡亦死,举大计亦死,等死,死国可乎?”陈胜曰:“天下苦秦久矣。吾闻二世少子也,不当立,当立者乃公子扶苏。扶苏以数谏故,上使外将兵。今或闻数有功,爱士卒,楚人怜之……乃丹书帛曰“陈胜王”,置人所罾鱼腹中。卒买鱼烹食,得鱼腹中书,固以怪之矣。又间令吴广之次所旁丛祠中,夜篝火,狐鸣呼曰“大楚兴,陈胜王”。卒皆夜惊恐。旦日,卒中往往语,皆指目陈胜。
【乙】马援①字文渊,扶风茂陵人也。援年十二而孤,少有大志,诸兄奇之。后转游陇汉间,常谓宾客曰:“丈夫为志,穷当益坚,老当益壮。”初,援军还,将至,故人多迎劳之。平陵人孟冀,名有计谋,于坐贺援。援谓之曰:“吾望子有善言,反同众人邪②?昔伏波将军路博德开置七郡③,裁封数百户;今我微劳,猥④享大县,功薄赏厚,何以能长久乎?先生奚用相济⑤?”冀曰:“愚不及。”援曰:“方今匈奴、乌桓尚扰北边,欲自请击之。男儿当死于边野,以马革裹尸还葬耳,何能卧床上在儿女手中邪!”冀曰:“确为烈士,当如此矣。”
【注释】①马援:东汉名将。②反同众人邪:(怎么)反而同众人一样(来吹捧我)呢?③开置七郡:开拓疆土,增设了七郡。④猥:说话人表示谦卑的词。⑤奚用相济:用什么来帮助(我)?
根据下列四则材料内容,选择正确答案。
(A) For Sale
Bicycle made in China
Good condition
Zhang Ying, 306, dormitory(寝室)4
(B) Roommate Wanted
Male(男)—English native speaker
wanted to share a 2- bedroom apartment
near campus(校园), washer, dryer, kitchen
Call Li, 288-940605 any evening after 5
(C) Lost
Black briefcase(公文包)with 3 books on physics
Call: John Smith 843-3160645
(D) Found
Brown briefcase with some money
See: Joseph Hofman in Chemistry Dept(系)
His parents didn't earn much money so he dropped out of school because of p____(贫穷).