II. Listening Skills Listening for names 1. Doris: Good morning. Can I help you? David: Yes. I need to change one of my courses Doris: I'll see what we can do. What's your name, please? David: My names David Brown Doris: Your first name again? David: David. D-A-V-L-D

Uint I. Basic listening practice 1. Script M: Amy, sit down, we need to talk. Your mother and i are going to separate W: What! Are you crazy? You cant do that! What will my friends say? I just want to have a normal family Q: What is the girl saying?

§1 复数及代数运算 §2 复数的几何表示 §3 复数的乘幂与方根 §4 区域

#include void maino for(i=l;i<=5;++) *外循环的次数为需打印的行数* for(=1j<=2*i-1j+)/*内循环的次数由所打印行数决定*

12-4外代数 12.4.1域K上的线性空间V的到域K上的线性空间W的r重交错映射的定义 定义12.9设V是数域K上的n维线性空间,又设W也是K上的一个线性空间。 从 x…xV 到W的一个多线性映射f如果满足如下条件 f(aaaa)=0(i=1,2r-1) (即第i,i+1两个变元取V内同一个向量a1),则称f为一个r重交错映射。 12.3.2r重交错映射的三条性质

#defineS sum(int arr[, int); printf(\请输入%d个整数:n\,N), for(i=0; i