单选题It can be inferred from the passage that _____A “mental cosmetics” is already a reality.B a new generation of mind-enhancing drugs may be a near future.C Ritalin and Modafinil have no mind-enhancing properties.D cognitive enhancers have been developed

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单选题

It can be inferred from the passage that _____

“mental cosmetics” is already a reality.

a new generation of mind-enhancing drugs may be a near future.

Ritalin and Modafinil have no mind-enhancing properties.

cognitive enhancers have been developed perfectly.

更多“单选题It can be inferred from the passage that _____A “mental cosmetics” is already a reality.B a new generation of mind-enhancing drugs may be a near future.C Ritalin and Modafinil have no mind-enhancing properties.D cognitive enhancers have been developed ”相关问题

第1题

From this passage we know that ______.A. every American cannot have gunsB. only soldiers and police can have gunsC. every American citizen can own gunsD. teachers have no money to buy guns

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第2题

During the past generation, the American middle-class family that once could count on hard work and fair play to keep itself financially secure has been transformed by economic risk and new realities. Now a pink slip, a bad diagnosis, or a disappearing spouse can reduce a family from solidly middle class to newly poor in a few months. In just one generation, millions of mothers have gone to work, transforming basic family economics. Scholars, policymakers, and critics of all stripes have debated the social implications of these changes, but few have looked at the side effect: family risk has risen as well. Today's families have budgeted to the limits of their new two-paycheck status. As a result, they have lost the parachute they once had in times of financial setback-a back-up earner (usually Mom) who could go into the workforce if the primary earner got laid off or fell sick. This "added-worker effect" could support the safety net offered by unemployment insurance or disability insurance to help families weather bad times. But today, a disruption to family fortunes can no longer be made up with extra income from an otherwise-stay-at-home partner. During the same period, families have been asked to absorb much more risk in their retirement income. Steelworkers, airline employees, and now those in the auto industry are joining millions of families who must worry about interest rates, stock market fluctuation, and the harsh reality that they may outlive their retirement money. For much of the past year, President Bush campaigned to move Social Security to a saving-account model, with retirees trading much or all of their guaranteed payments for payments depending on investment returns. For younger families, the picture is not any better. Both the absolute cost of healthcare and the share of it borne by families have risen--and newly fashionable health-savings plans are spreading from legislative halls to WalMart workers, with much higher deductibles and a large new dose of investment risk for families' future healthcare. Even demographics are working against the middle class family, as the odds of having a weak elderly parent--and all the attendant need for physical and financial assistance have jumped eightfold in just one generation. From the middle-class family perspective, much of this, understandably, looks far less like an opportunity to exercise more financial responsibility, and a good deal more like a frightening acceleration of the wholesale shift of financial risk onto their already overburdened shoulders. The financial fallout has begun, and the political fallout may not be far behind． It can be inferred from the last paragraph that__A.financial risks tend to outweigh political risks B.the middle class may face greater political challenges C.financial problems may bring about political problems D.financial responsibility is an indicator of political status

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第3题

Space is a dangerous place,not only because of meteors but also because of rays from the sun?and other stars.The atmosphere again acts as our protective blanket on earth.Light gets through,and?this is essential for plants to make the food which we eat.Heat,too,makes our environment endurable.Various kinds of rays come through the air from outer space,but enormous quantities of radiation from the sun are screened off.As soon as men leave the atmosphere they are exposed to this radiation.But their spacesuits or the walls of their spacecraft,if they are inside,do prevent a lot of radiation damage. Radiation is the greatest known danger to explorers in space.The unit of radiation is called"rein".Scientists have reason to think that a man can put up with far more radiation than 0.1 rem?without being damaged;the figure of 60 rems has been agreed on.The trouble is that it is extremely?difficult to be sure about radiation damage—a person may feel perfectly well,but the cells of his or?her sex organs may be damaged,and this will not be discovered until the birth of deformed(畸形的)children or even grandchildren.Missions of the Apollo flights have had to cross belts of high radiation?and,during the outward and return journeys,the Apollo crew accumulated a large amount of rems.So?far,no dangerous amounts of radiation have been reported,but the Apollo missions have been quite?short.We simply do not know yet how men are going to get on when they spend weeks and months?outside the protection of the atmosphere,working in a space laboratory.Drugs might help to decrease?the damage done by radiation,but no really effective ones have been found so far.It can be inferred from the passage that__A.the Apollo mission was very successful B.protection from space radiation is no easy job C.astronauts will have deformed children or grandchildren D.radiation is not a threat to well-protected space explorers

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第4题

It can be inferred from the passage that all of the following are literary detectives who have tried，by means of either scholarship or criticism，to help solve the“great puzzle”mentioned in the first line EXCEPT( ) A.BardecheB.ValletteC.FalloisD.Kolb

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第5题

It can be inferred from the last paragraph of the passage that the chairperson who resigned from the panel to develop a coordinated federal program for radiation regulation most likely did so because( ) A.he or she disagreed with the findings of the Senate committeeB.regulatory efforts have been balked by disputes，confusion，and bureaucratic delaysC.he or she supported the position of the National Academy of Sciences Committee and opposed regulation of radiation exposureD.he or she was disorganized and inconsistent in chairing the panel

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第6题

The fifth-generation computers，with artificial intelligence，( )and perfected now. A.developedB.have developedC.are being developedD.will have been developed

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第7题

单选题The passage specifically states that __________.A direct experiences are more valuable than indirect onesB whatever attitudes a child learns in school have already been introduced at homeC teachers should always conceal their own attitudesD teachers can sometimes have an unwholesome influence on children

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单选题It can be inferred from the passage that _____A “mental cosmetics” is already a reality.B a new generation of mind-enhancing drugs may be a near future.C Ritalin and Modafinil have no mind-enhancing properties.D cognitive enhancers have been developed

题目

更多“单选题It can be inferred from the passage that _____A “mental cosmetics” is already a reality.B a new generation of mind-enhancing drugs may be a near future.C Ritalin and Modafinil have no mind-enhancing properties.D cognitive enhancers have been developed ”相关问题

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