选出你所听到的句子( )
A:Young people's memories are better than old people's.
B:Young people usually have better memories than old people.
C:Young people usually have bad memories than old people.
人们常用“冰山一角”来形容事物显露出来的仅仅是其很小的一部分,更多的还隐藏在表面现象之下.事实上,冰山浮在海水中的确只露“一角”,那么这露出的“一角”到底占冰山大小的多少呢?请你用物理知识通过计算来说明.
(已知ρ海水=1.03×103kg/m3,ρ冰=0.9×103kg/m3)
—I am afraid not.
下列有关物质应用的叙述中,错误的是( )