A:来吾道夫先路也
B:恐美人之迟暮
C:伤灵修之数化
D:荃不察余之中情兮
果蝇的长翅(V)对残翅(v)为显性,但纯合长翅品系的幼虫,在35 ℃条件下培养成的成体果蝇为残翅。下列叙述正确的是( )
河堤横断面如图所示,堤高BC=6米,迎水坡AB的坡比为1: 3 ,则AB的长为( )
Progress suggests a person's ability to change the way he is living at the moment and it must ______ a better life and a better way of doing things.
用化学用语填空
地壳中含量最多的元素____;铝制品表面的氧化膜____;胃酸中的酸____;硬水中的镁离子____.