阅读理解。

Jack: Sue! You wear a new coat! It's nice!

Sue: Thank you, Jack. This is my birthday present.(礼物)

Jack: Oh! When is your birthday?

Sue: It's October 1st. It's National Day, too.

Jack: It's great! Who gave (给) this great present to you?

Sue: My mother. I received (收) a lot of presents from my family.

Jack: I think you must be (一定) happy that day.

Sue: Of course, I enjoyed my birthday party very much.

1. What's Sue's birthday present?

A. A new coat.

B. A new watch.

C. A new bike.

2. When is Sue's birthday?

A. Teachers' Day.

B. New Year's Day.

C. National Day.

3. Who gave this present to Sue?

A. Her father.

B. Her brother.

C. Her mother.

4. Is Sue happy on her birthday?

A. No, she isn't.

B. Yes, she is.

C. She is happy.

何谓金属离子置换修饰？简述其主要修饰过程和作用。