$\sin 43°\cos 13°-\cos 43°\sin 13°$的值等于（   ）

从方框内选择适当的句子补全对话, 其中有两项是多余的。

A: Hello, Jay. May I ask you some questions?

B: Sure!

A: ____

B: I like collecting postcards.

A: ____

B: The pictures on them. I can learn different cultures from them.

A: That's right. Many people like collecting them.

B: ____

A: Yes, I like collecting CDs.

B: Can you tell me why you like it?

A: ____

B: Do you think developing hobbies is important?

A: Yes. ____

B: But we can't spend too much time on it. We should study hard.

A: You're right.

氧化汞受热时的变化可用下图表示（图中大圆圈表示汞原子，小圆圈表示氧原子）。据图得出的下列结论中。错误的是（  ）

已知一次函数y₁=x+m的图象与反比例函数y₂=$\frac{6}{x}$的图象交于A，B两点，已知当x＞1时，y₁＞y₂；当0＜x＜1时，y₁＜y₂，一次函数的解析式（　　）