There are two new students in our class.I don't know _____of them.
A:either
B:nor
C:neither
能组成____个两位数
下列叙述不正确的是( )
为探究燃烧的条件,设计如图甲、乙两个实验.请回答:
(1)乙和甲相比,乙的优点是____ .
(2)两个实验中,红磷的作用是____ .