A:a sheep
B:sheep
C:sheeps
某同学指出:在用伏安法测量电阻值的实验中,必须注意下列几点,你认为其中不必要的一条是( )
下列关于遗传病叙述中,不正确的是( )
The Chinese saying “A tree can't make a forest” tell us that is very important in a football match.