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【简答题】
二烯类脂主要包括_____、______维生素和______及其衍生物,类固醇的结构以_____为核心。_____与磷脂一起构成细胞的质膜。
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举一反三
【单选题】— When did you start to collect stamps? — I got my ______ stamp when I was ______ years old.
A.
one, seven
B.
one, seventh
C.
first, seventh
D.
first, seven
【单选题】— ____________? — Since I was five years old.
A.
How often do you skate?
B.
When did you begin to play baseball?
C.
How long have you been studying French
【单选题】— Could you play the guitar when you were 8 years old? — _____. [ ]
A.
Yes, I could.
B.
No, I can't.
C.
Yes, I can.
D.
No, I won't.
【简答题】瑞霞即将走向工作岗位,她选了一件格子呢西装,但又担心会显得成熟和老气,其实西装隐藏许多小心机。
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