根据结果，写出两道乘法算式和两道除法算式．

63

22．在Na₂SO₄、NaCl、NaOH的混合溶液中，含有Na⁺、SO₄^2-、OH^-的个数比8:1:2，则溶液中Na₂SO₄、NaCl、NaOH个数比为（      ）

选择适当的选项补全对话。

A. Is he friendly? B. Yes, you're right. C. A boy or a girl? D. Who's he? E. No. He has glasses and his shoes are blue.

John: Hello, Sarah! I have a new friend.
Sarah: ____
John: A boy.
Sarah: ____
John: He is tall and thin. He has short hair.
Sarah: ____
John: Yes, and he is nice, too.
Sarah: Is he Mike?
John: ____
Sarah: I know. He is Peter. He is near the door.
John: ____

下列关于纬线的说法，正确的是（    ）

看图回答

4元/枝