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Much of the research on nutrient deficiencies is based on growing plants hydro-ponically, that is, in soilless liquid nutrient s
Much of the research on nutrient deficiencies is based on growing plants hydro-ponically, that is, in soilless liquid nutrient s
admin
2014-09-29
48
问题
Much of the research on nutrient deficiencies is based on growing plants hydro-ponically, that is, in soilless liquid nutrient solutions. This technique allows researchers to create solutions that selectively omit certain nutrients and then observe the resulting effects on the plants. Hydroponics has applications beyond basic research, since it
facilitates
the growing of greenhouse vegetables during winter. Aeroponics, a technique in which plants are
suspended
and the roots misted with a nutrient solution, is another method for growing plants without soil.
The word "
suspended
" in the passage is closest in meaning to
选项
A、grown
B、protected
C、spread out
D、hung
答案
D
解析
转载请注明原文地址:https://jikaoti.com/ti/RyhYFFFM
0
托福(TOEFL)
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