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Most protein in underdeveloped countries comes from cereals.Australians eat about 60 grams of protein a day;

the average Indian islucky if he gets10 grams.

In a place like India,the protein is not distributed evenly. Children,who need it most,often get the least.This causes serious

malnutrition(营养不良)which results in underdeveloped bodies. The brzin isparticularly affected so that children,

if they survive( 活下来 ) , oftengrow into mentally retarded( 迟钝 )adults.

Studies have shown that about half a hectare( 公顷 )of land is neededper head of population to provide a minimum

adequate diet( 适合的饮食 ) .Australia at present farms almost one hectare per head of population.

The world has 3200 million hectares of land available for farming.Simple arithmetic shows that this can support a

population of 1600million people.Even if we farm with four times the efficiency, therewill still be many starving people

by the year 2000 when the duced is used to feed cattle, poultry and pigs. For example , it isestimated that a bullock(小

公牛 )needs to consume 20 kilograms of grainto produce only one kilogram of beef.

51.The passage mainly focuses on --

a.sources of protein b.overpopulation

c.shortage of food d.malnutrition in Indian children

52.The second and the third paragraphs tell us --

a.cereals are rich in protein

b.some Indian children suffer from malnutrition

c.children need little protein in India

d.Australians daily diet lacks protein

53.Which of the following is NOT mentioned in the fourth and thefifth paragraphs?

a.Ways to improve farming efficiency.

b.World land available for farming.

c.Farming in Australia at present.

d.World population.

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