题目内容

配制营养液一般配制____、____两种。

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母液配制中,一般将其配方中的化合物分为三类,其配成的浓缩液分别称为____、_____和____。

Dr.Smith is going to pull out one of my _________.

A. teeth
B. tooth
C. teeths
D. tooths

_____ on trees turn green in spring.

A. Leaf
B. Leafs
C. Leave
D. Leaves

______ usually go to church every Sunday.

A. The Brown
Brown
C. Browns
D. The Browns

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