【名词&注释】
蛋白质(protein)、组织细胞(histocyte)
[单选题]一种生物不同组织细胞的蛋白质和DNA分子，其组成和结构
A. 蛋白质相同，DNA不同
B. DNA相同，蛋白质不同
C. 都相同
D. 都不同
查看答案&解析
举一反三：
[单选题]--- Bill, can I get you anything to drink?--- .
A. You are welcome B． No problem
B. I wouldn't mind a coffee D． Doesn’t matter
[单选题]My friend showed me round the town,____________was very kind of him.
A. which
B. that
C. where
D. it
[单选题]The retired man donated most of his savings to the school damaged by the ea rthquake in Yushu ,________the students to return to their classrooms.
A. enabling
B. having enabled
C. to enable
D. to have enabled
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