单项选择题

A．It receives more nutrients than it can absorb.
B．It becomes oversaturated with water.
C．It loses the ability to support insect life.
D．It loses nutrients that aren’t replaced.
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单项选择题
A．He wants to live off campus.B．There are advantages and disadvantages to living off campus.C．Living space in the dorm is crowded.D．There are only a few apartments available off campus.
A．He wants to live off campus.
B．There are advantages and disadvantages to living off campus.
C．Living space in the dorm is crowded.
D．There are only a few apartments available off campus.
单项选择题
A．How historical events affected an art movement.B．How artists can influence economic conditions.C．Why a certain art movement failed to become popular.D．How valuable paintings were lost during wartime.
A．How historical events affected an art movement.
B．How artists can influence economic conditions.
C．Why a certain art movement failed to become popular.
D．How valuable paintings were lost during wartime.
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