A:①②
B:②③
C:①③
D:③④
小明的父亲没有白化病,母亲患有白化病,则小明是否患有白化病?(用基因A、a表示)
580×46=
216×39=
48×283=
253×56=
946÷43=
858÷39=
918÷27=
618÷88=
写出下列名词的复数形式。
①May I have some ____ (plum), please? Sure.
②There are seven ____ (boy) in the playground.
③The woman has two ____ (baby).
④How many ____ (peach)? There is only one.
⑤There are two ____ (library) in our school.