用所学单词自编两个句子。
例如：I can draw, I can draw, I can draw a flower.
I can read, I can read, I can read a book.
I can sing, I can sing, I can sing a song.
株洲攸县的5岁女孩刘桢用稚嫩的双肩撑起一个残破的家庭。她不仅要照料瘫痪的父亲，还要种菜做家务。对此，以下说法正确的是（ ）
将电阻为R1=3Ω的导体与电阻为R2的导体串联后总电阻为9Ω，则R1与R2并联后总电阻是
They were ____ ____ ____ ____a word when they met again 20 years later.
