圆的半径扩大2倍后，它的面积与原来比（）A．扩大2倍B．扩大

首页 / 小学数学 / 试题详细

圆的半径扩大2倍后，它的面积与原来比（　　）

A．扩大2倍

B．扩大4倍

C．缩小4倍

D．不变

登录免费查看答案和解析

相关试题

- Must I study medicine and be a doctor like you，Dad？

- No，you ______________，son.You're free to make your own decision.

A．

can't

B．

mustn't

C．

shouldn't

D．

needn't

收藏答案/解析

-China is a great country with a history of about five ________ years.

- Yes.And ___________ of foreigners come to visit it every year.

A．	thousand；thousand	B．	thousands；thousands
C．	thousand；thousands	D．	thousands；thousand

收藏答案/解析

-Dad，could you please teach ___________ English？

-Sure!But it's more important to learn it by __________.

A．	my；yourself	B．	my；you
C．	me；you	D．	me；yourself

收藏答案/解析

On February 25，President Xi Jinping announced that China has made a "complete ________" in its fight against poverty （贫困）.

A．	victory	B．	progress
C．	difference	D．	improvement

收藏答案/解析

- What's ______population of China？

- It has ______population of 1.4 billion.

A．

a；a

B．

a；the

C．

the；a

D．

the；the

收藏答案/解析