Hi! I'm Nini. I'm a monkey. I like riding my bike. But I don't like skipping. Huanhuan is my brother. He likes basketball. I have(有)a good friend(朋友). Her name is Qiqi. She is a panda. She is fat. She likes table tennis.
根据短文内容选择正确的图片。
如图所示,物块M在光滑斜面上从A匀速滑到C,速度v=2m/s,其中AB=6m,AC=10m,物块M重GM=100N,物块m重Gm=40N (不计滑轮重,绳重,绳与滑轮间摩擦)求:
读课文《黄鹤楼送别》填空
“岸边杨柳依依,江上沙鸥点点。”这两句话属于____句式,这种句式的表达作用是____。它描写了____,为后文抒情作铺垫。
正常男性体细胞的染色体组成是( )
若代数式x2+3x+5的值为7,则代数式3x2+9x﹣2的值等于( )