The water hyacinth (水胡芦) grows in tropical (热带的) countries. It has beautiful purple-blue flowers,but everybody hates it. Millions and millions of these plants grow in rivers and lakes. Sometimes the plants become so thick that people can walk on them. People cannot travel in boats ...
Farmers can grow these fish in the lakes and rivers with water hyacinths.”和“So it will be possible to make methane gas with water hyacinths.”可知,可以用来喂鱼,制造甲烷气体。③④是水葫芦的用途。故选A。 (5)题详解: 主旨大意题。根据“But now scientists think that water hyacinths can ...
Water hyacinth(凤眼蓝,水葫芦) appears. Its leaves are carried on stalks, filled with air, that also make it virtually unsinkable. The race for spaceintensifies. A new competitor arrives - Ludwigia(重根丁香蓼). It spreads by developing a chain of tiny rafts, andjostlesfor space with the d...
Phytoremediation is based on the capability of plants to remove hazardous contaminants present in the environment. This study aimed to demonstrate some factors controlling the phytoremediation efficiency of live floating plant, water hyacinth ( Eichhornia crassipes), towards the effluents contaminated with ...
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The water hyacinth(水葫芦) is one of the fastest growing water plants and it grows in many countries. It has beautiful purple-blue flowers but most people don't like it. Millions of water hyacinths grow in rivers and lakes. Sometimes the plants become so thick that people can walk on th...
The water hyacinth(水葫芦)grows in tropical countries where the weather is hot and wet.It has beautiful purple-blue flowers,but everybody hates it.Why? Millions and millions of these plants grow in rivers and lakes.Sometimes the plants become so thick that people can walk on them.People cann...
The water hyacinth grows in tropical countries. It has beautiful purple-blue flowers,but everybody hates it. Millions and millions of these plants grow in rivers and lakes. Sometimes the plants become so thick that people can walk on them. People cannot
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Aquatic plants are generally not suitable for direct filtration of aquaculture wastewater. In a hydroponics system, if commercially valuable plants such as water hyacinths, duck weed, hydrilla, and cattails are grown, they can be used to absorb nitrates and phosphorus from wastewater in addition to...