因式分2m2-8n2=______.
2m2-8n2,
=2(m2-4n2),
=2(m+2n)(m-2n).
一个圆的半径为4cm,它的面积和周长相等.______.
翻译下列句子。
1. 到目前为止,这个项目已经把成千上万的海外中国学子带回中国来寻根。
_____ _____ this program has brought _____ _____ overseas Chinese students to
China to _____ _____ their families' roots.
2. 多亏你的帮忙,我才取得这么大的进步。
_____ _____ your help, I have made such great progress.
3. 我正在期盼见到你们。
I am _____ _____ _____ _____ you.