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【单选题】
革兰阳性菌与革兰阴性菌的细胞壁肽聚糖结构的主要区别在于A.
聚糖骨架
B.
四肽侧链
C.
五肽交联桥
D.
β-1,4糖苷键
E.
N-乙酰葡糖胺与N-乙酰胞壁酸的排列顺序
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举一反三
【简答题】He brought us a piece of (surprise) ______ news.
【简答题】Though he was born and brought up in America, ?Though he was born and brought up in America, he can speak ___________ Chinese. A)fluid B) smooth C) fluent D) flowing
【单选题】What is true about the man?
A.
He was born in Scotland and brought up in England.
B.
He was born in England and brought up in Scotland.
C.
He was born and brought up in Scotland.
D.
He was born and brought up in England.
【单选题】Although he was born and brought up in America, he ______ Chinese fluently.
A.
speaks
B.
will speak
C.
can speak
D.
would speak
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