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【单选题】
函数 必有零点的区间是( )A.
（-1,0)
B.
(0,1)
C.
(1,2)
D.
(2,3)
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反馈参考答案：
举一反三
【简答题】Which part of plant cell is fully permeable?_____________
【单选题】Which part of a plant root hair is partially permeable?
A.
the cell sap
B.
the cell surface membrane
C.
the cell vacuole
D.
the cell wall
【单选题】Which part of a plant cell controls the movement of substances into and out of the cell?
A.
cell membrane
B.
cell wall
C.
cytoplasm
D.
vacuole
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