想一想,再比一比,把序号写进框里。
①2个十,9个一②100③36+7④6个十,0个一⑤5个十,1个一
____
蜻蜓的眼睛是由20000多只小眼组成的.蜻蜓眼睛的上半部分专看远处,下半部分专看近处.
20000=____万
六千多万年前形成的山脉称为“____”。
— Nowadays more and more foreigners are becoming interested in Beijing Opera.
—That's true. It's an important part of Chinese____________.