钢锭由冒口、锭身和水口三部分组成.
参考答案：对
—Please remember, kids. ______ careful you are, _______mistakes you will make.
—We know, Mr. Li.
A．the more; the little
B．the fewer; the more
C．the more; the fewer
D．the more; the less
已知函数y=y(x)在任意点x处的增量
，其中a是比Δx(Δx→0)高阶的无穷小，且y(0)=π，则y(1)=______．
A．
B．2π C．π D．
，其中a是比Δx(Δx→0)高阶的无穷小，且y(0)=π，则y(1)=______．
