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[主观题]

All minerals are compounds of various elements.

提问人：网友xzhuan 发布时间：2022-01-07

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更多“All minerals are compounds of …”相关的问题

第1题

All minerals are compounds of various elements. （covalent / ionic)

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第2题

All plants need light, a suitable climate, and a（n) ______ supply of water and minerals fr

All plants need light, a suitable climate, and a(n) ______ supply of water and minerals from the soil, but some species grow best in the sun and others thrive in the shade.

A．boundless

B．supplementary

C．continual

D．ample

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第3题

There is a variety of Chinese materia medica which includes __________.

A.plants

B.animals

C.minerals

D.all above

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第4题

What option is proposed as an alternative when all of the mineral resources in easily acce

ssible locations have been depleted？

A．Converting to nonrenewable resources

B．Concentrating on conservation of the resources

C．Developing synthetic resources to replace minerals

D．Using new technology to search the area again

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第5题

All of the following are mentioned in the discussion of lichens EXCEPT ______.A．They are c

All of the following are mentioned in the discussion of lichens EXCEPT ______.

A．They are capable of producing their own food.

B．They require large amounts of minerals lo prosper.

C．They are a union of two separate plants.

D．They can live thousands of years.

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第6题

Eight percent of the Earth's crust is aluminum, and there are hundreds of aluminum-bearing

minerals and vast quantities of the rocks that contain them. The best aluminum ore is bauxite, defined as aggregates of aluminous minerals, more or less impure, in which aluminum is present as hydrated oxides. Bauxite is the richest of all those aluminous rocks that occur in large quantities, and it yields alumina, the intermediate product required for the production of aluminum. Alumina also occurs naturally as the mineral corundum, but corundum is not found in large deposits of high purity, and therefore it is an impractical source for making aluminum. Most of the many abundant nonbauxite aluminous minerals are silicates, and like all silicate minerals, they are refractory, resistant to analysis, and extremely difficult to process. The aluminum silicates are therefore generally unsuitable alternatives to bauxite because considerably more energy is required to extract alumina from them.

The intermediate product needed for the production of aluminum is______.

A．hydrated oxides

B．bauxite

C．alumina

D．silicates

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第7题

Please refer _______the FAQs tab on media, com and you may make clear almost all the quest

ions you have.

A．for

B．that

C．to