问题
填空题
情景交际。填入正确的单词，完成下列对话。
A: Hello!
B: Hello! Where are you 1. ?
A: 2. going to the zoo.
B: Great! What's your 3. animal?
A: I like panda best. How 4. you?
B: My favourite animal is giraffe. It's lovely.
A: Would you like to go 5. me?
B: OK. Let's go!
答案
1. going 2. I'm 3. favourite 4. about 5. with
步长为h的梯形方法计算公式是yn+1=（①），n=0，1，2，···。梯形方法的局部截断误差Tn+1=ahky(k)(xn)+O(hk+1)，其中整数k=（②），a是常数。