400÷20＝____
390＋56＝____
45×30＝____
150×6＝____
20＋80×4＝____
540－190＝____
24×50＝____
201×4＝____
6000÷30＝____
9＋9×10＝____
Anna a red skirt, but she doesn't a black one.
There is a c____ (矛盾) between what you say and what you do.
下列哪项不进行呼吸作用？（ ）
