It's eight o'clock, Jim's family are ____ (watch)TV.
Our _______ name is Mr Black. ( )
将质量为3kg的木块放在盛有水的容器中,木块漂浮时有 25 的体积露出水面,则木块的密度为____g/cm3,木块的体积为____cm3.
下列不属于青春期身体变化的特点的是( )