时下人们爱用“最美”这一词赞美在危难关头舍己救人的英雄人物，如“最美女教师张丽莉”“最美司机吴斌”……在二十世纪五十年代人们用“最可爱的人”来赞美抗美援朝中涌现出的英雄人物。被誉为“最可爱的人”的英雄人物是（ ）
①黄继光 ②董存瑞 ③邱少云 ④杨靖宇
A：①②
B：②③
C：①③
D：③④
把一小块实心金属放入盛满酒精（ρ酒精=0．8×103千克／米3)的杯中时，从杯中溢出8克酒精，若将该金属块放入盛满水的杯中时，从杯中溢出水的质量( )
阅读理解
Yesterday Peter felt very sorry because he forgot (忘记) to say “Happy Birthday” to his uncle . So he wrote a letter to his uncle : “My dear uncle, I'm very sorry because I forgot your birthday. But to teach me a lesson, you'd better (最好) forget my birthday on Tuesday, tomorrow.”
百分数的计数单位是（）。
