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[单选题]

Lack of Zinc _____causes a range of problems, although little scientific evidence supports the link.

A.scarcely

B.supposedly

C.appropriately

D.definitely

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发布时间：2022-05-20

更多“Lack of Zinc _____causes a range of problems, although little scientific evidence supports the link.”相关的问题

第1题

It is very common for fireworks to contain aluminum, iron, steel, zinc or magnesium dust.A

It is very common for fireworks to contain aluminum, iron, steel, zinc or magnesium dust.

A．Y

B．N

C．NG

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第2题

Canada is the worlds ______producer of nickel, zinc, and asbestos.A．primaryB．secondC．third

Canada is the worlds ______producer of nickel, zinc, and asbestos.

A．primary

B．second

C．third

D．fourth

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第3题

Which of the following is NOT a minimal pair in English？A．bat and "pat".B．sink and "zinc".

Which of the following is NOT a minimal pair in English？

A．bat and "pat".

B．sink and "zinc".

C．fine and "wine".

D．teach and "cheat".

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第4题

Zinc can help reproduce many new brain cells.A．YB．NC．NG

Zinc can help reproduce many new brain cells.

A．Y

B．N

C．NG

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第5题

Why does the author mention "Indian mustard"？A．To warn about possible risks involved in ph

Why does the author mention "Indian mustard"？

A．To warn about possible risks involved in phytoremediation

B．To help illustrate the potential of phytoremediation

C．To show that hyperaccumulating plants grow in many regions of the world

D．To explain how zinc contamination can be reduced

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第6题

Including a few bites of meat in the diets of poor children from developing countries impr

oves both their health and their performance in mental tests, according to reports presented at this years annual meeting of the American Association for the Advancement of Science. In one study from rural Kenya,【C1】______found that children who ate【C2】______ounces of meat every day, along with their lunch of corn and beans,【C3】______better in problem-solving tests【C4】______children given supplements of milk or vegetable oil. This small【C5】______of meat gave children all their daily needs【C6】______vitamin B12, 68 percent of all they needed of zinc, and 26 percent of their daily iron【C7】______, the researchers noted. Dr. Howarth Bouis of the International Food Policy Research Institute in Washington D. C, told Reuters Health that research【C8】______children who dont get enough iron, zinc and other【C9】______have a weakened immune system,【C10】______growth and cognitive impairments. And when entire generations of children arent getting enough nutrients,【C11】______can have implications nationwide, Bouis added.【C12】______, the World Bank estimates that micronutrient deficiencies【C13】______South Asia 5 percent of its GDP each year, he said. "When you cant work【C14】______hard, you cant think as well. It【C15】______from economic development, " Bouis said. He added that children in【C16】______countries dont get enough nutrients【C17】______they cant afford them, so its up to the government to【C18】______. For instance, the government could【C19】______programs that increase production of nutrient-rich foods, which【C20】______down the price, Bouis suggested.

【C1】

A．investigators

B．reporters

C．scientists

D．students

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第7题

Only recently have investigators considered using these plants to clean up soil and waste

sites that have been contaminated by toxic levels of heavy metals—an environmentally friendly approach known as phytoremediation. This scenario begins with the planting of hyperaccumulating species in the target area, such as an abandoned mine or an irrigation pond contaminated by runoff. Toxic minerals would first be absorbed by roots but later relocated to the stem and leaves. A harvest of the shoots would remove the toxic compounds off site to be burned or composted to recover the metal for industrial uses. After several years of cultivation and harvest, the site would be restored at a cost much lower than the price of excavation and reburial, the standard practice for remediation of contaminated soils. For example, in field trials, the plant alpine pennycress removed zinc and cadmium from soils near a zinc smelter, and Indian mustard, native to Pakistan and India, has been effective in reducing levels of selenium salts by 50 percent in contaminated soils.

Which of the sentences below best expresses the essential information in the highlighted sentence in paragraph 6？ Incorrect choices change the meaning in important ways or leave out essential information.

A．Before considering phytoremediation, hyperaccumulating species of plants local to the target area must be identified.

B．The investigation begins with an evaluation of toxic sites in the target area to determine the extent of contamination.

C．The first step in phytoremediation is the planting of hyperaccumulating plants in the area to be cleaned up.

D．Mines and irrigation ponds can be kept from becoming contaminated by planting hyperaccumulating species in targeted areas.

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第8题

根据材料请回答 41～45 Live with ComputerAfter too long on the Net, even a phone call ca

根据材料请回答 41～45

Live with Computer

After too long on the Net, even a phone call can be a shock.My boyfriend's Liver-pudlian(利物普人的)accent suddenly becomes indecipherable after the clarity of his words on screen; a secretary's tone seems more rejecting than I'd imagined it would be.Time it-self becomes fluid -- hours become minutes, and alternately seconds.Stretch into.days.Weekends, once a highlight of my week, are now just two ordinary days.

For the last three years, since I stopped working as a producer, I have done much of my work as a telecommuter.I submit articles and edit them via E-mail and communicate with colleagues on Internet mailing lists.My boyfriend lives in U.K.; so much of our re-lationship is computer-mediated(以电脑为媒介的).

If I desired, I could stay inside for weeks without wanting anything.I can order food, and manage my money, love and work.In fact, at times I have spent as long as three weeks alone at home, going out only to get mail and buy newspapers and groceries(杂货).

But after a while, life itself begins to feel unreal.I start to feel as though I've merged with my machines, taking data in, spitting them back out, just another node(节点)on the Net.Others on line report the same symptoms.We start to strongly dislike the outside forms of socializing.We have become the Net opponents' worst nightmare.

What first seemed like a luxury, crawling from bed to computer, not worrying about hair, and clothes and face, has become an avoidance, a lack of discipline.And once you start replacing real human contact with cyber-interaction, coming back out of the cave can be quite difficult.

第 41 题 Compared to the clear words of her boyfriend on screen, his accent becomes__________.

A．unidentifiable

B．unbearable

C．unreal

D．misleading

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第9题

The representative office in London has to be shut down __________ funds.

A.for lack in

B.from a lack of

C.for a lack of

D.as lack in