下列各式 ①2x2+y；②0；③ 1a+b ；④3mn；⑤ x+y2 中，属于多项式的是_1

题干

下列各式 ①2x²+y；②0；③

1

a

+

b

；④3mn；⑤

x

+

y

2

中，属于多项式的是____

上一题下一题 0.0难度选择题更新时间:2012-01-30 09:05:09

①⑤

A

Today is Sunday, April 15th, everyone in Sheep Village（羊村）is very busy. What does he/she do?

I'm Nuan Yangyang. I write a letter to my friend at one o'clock in the afternoon. Then I do my homework.

I'm Fei Yangyang. I want to be strong（强壮的），so I go to the sports club to play sports in the morning. I go home at three ten in the afternoon.

I'm Lan Yangyang. I like eating. I have breakfast at home. I have lunch in a restaurant. But the food isn't good, I don't like it.

I'm Mei Yangyang. I go to a clothes store at nine in the morning. The clothes there are on sale, so I buy a nice skirt.

I'm Xi Yangyang. I take the bus to the English club at ten sixteen in the morning. There I help two kids learn to speak English.