选择合适的句子补全对话。

1. Amy: Look at my elephant.

    Mike: ___________________[ ]

A. Oh, it's lovely! I like it.

B. Thank you.

2. Lily: Can I have some milk?

    Lucy: ___________________[ ]

A. No, thanks.

B. Sure. Here you are.

3. Mike: What do you like?

    John: ___________________[ ]

A. I like hot dogs.

B. I have a ruler.

4. Mike: How old are you?

    Mary: ___________________[ ]

A. I am nine.

B. Welcome!

5. Chen: Where is my pencil?

    Amy: ___________________[ ]

A. Here it is!

B. Me too!

置换价公式中，G代表

A．纯基质的平均栓重

B．含药栓的平均重量

C．每个药栓的平均含药量

D．栓基的重量

E．药物的平均量