分解因式:m(x﹣y)+n(y﹣x)=____ .
匈奴在统一后迅速发展,它不包括( )
选择最佳答语。
① Good morning. ____ A. Yes, I like sweets.
② What do you see? ____ B. I hear a sheep.
③ Do you like sweets?____ C. It's sunny.
④ What do you hear? ____ D. Good morning.
⑤ How's the weather?____ E. I see a bee.
在与别人的沟通中,下列做法会起到反作用的是 ( )