Don’t you let____ help you?
A:I and my friend
B:my friend and I
C:my friend and me
D:me and my friend
观察同一资料的同一部位时,高倍镜下比低倍镜下看到的物象、视野、细胞数目分别是( )
下列关于青春期发育特点的叙述,错误的是( )
My parents are busy ________ the Spring Festival.