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【判断题】
外毒素主要为G+分泌到细胞外的蛋白质,耐热性低,毒性强。A.
正确
B.
错误
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举一反三
【单选题】As the Beatles represent the most important English contribution to rock in the 1960's, Bob Dylan is the most important American contributor. This is true in spite of the fact that he has never reache...
A.
has more influence on rock music
B.
has sold fewer records of his songs
C.
is more important in the record industry
D.
is less important in American rock