单项选择题

A．Sunlight.
B．Location.
C．Soil.
D．Good drainag
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单项选择题
A．He has climbed mountains using a stick.B．He has climbed mountains riding a home.C．He has climbed mountains supported by a guider.D．He has climbed mountains using a system be devised himsel
A．He has climbed mountains using a stick.
B．He has climbed mountains riding a home.
C．He has climbed mountains supported by a guider.
D．He has climbed mountains using a system be devised himsel
单项选择题
A．You can grow vegetables vertically.B．You can raise plants in a confined area.C．You can plant a wide variety of plants together.D．You can make a lot of profit.
A．You can grow vegetables vertically.
B．You can raise plants in a confined area.
C．You can plant a wide variety of plants together.
D．You can make a lot of profit.
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