Millions of irreplaceble exhibits in natural history museums are currently allowed to decay.Yet without analyses of eggs from museums,the studies linking pesticides with the decline of birds of prey would have been impossible .Therefore,funds must be raised to preserve at least those exhibits that will be most valuable to science in future.
The argument presuuposes that
A if a museum exhibit is irreplaceable ,its preservation is of an importance that overrides economic considerations
B the scientific analysis of museum exhibits can be performed in a nondestructive way
C eggs of extinct species should be analyzed to increase knowledge of genetic relationships among species
D it can be known at this time what data will be of most use to scientific inbestigators in the future.
E the decay of organic material in natural history exhibits is natural and cannot be prevented
A有什么不对了？
Rhizobium bacteria living in the roots of bean plants or other legumes produce fixed nitrogen,which is one of the essential plant nutrients and which for nonlegume crops,such as wheat,normally must be supplied by application of nitrogen-based fertilizer So if biotechnology succeeds in producing wheat strains whose roots will play host to Rhizobium bacteria,the need for artificial fertilizers will be reduced.
The argument above makes which one of the following assumptions?
A Biotechnology should be directed toward producing plants that do not require artificial fertilizer.
B Fixed nitrogen is currently the only soil nutrient that must be supplied by artificial fertilizer for growing wheat crops.
C There are no naturally occurring strains of wheat or other grasses that have Rhizobium bacteria living in their roots.
D Legumes are currently the only crops that produce their own suuply of fixed nitrogen.
E Rhizobium bacteria living in the roots of wheat would produce fixed nitrogen.
为什么B不对了？
Current legislation that requires designated sections for smokers and nonsmokers on the premises of privately owned businesses is an intrusion into the private sector that cannot be justified.The fact that studies indicate that nonsmokers might be harmed by inhaling the smoke from others's cigarettes is not the main issue.Rather,the main issue concerns the government's violation of the right of private businesses to determine their policies ad rules.
Which one of the following is a principle that,if accepted could enable the conclusion to be properly drawn?
A Government intrusion into the olicies and rules of private businesses is justified only when individuals might be harmed.
B The right of individuals to breathe safe air supersedes the right of businesses to be free from government intrusion.
C The right of businesses to self determination overides whatever right or duty the goverment may have to protect the individual.
D It is the duty of private businesses to protect employees from harm in the workplace.
E Where the rights of businesses and the duty goverment conflict,the main issue is finding successful compromise.
B怎么不对了？作者: bnbf 时间: 2005-4-2 07:32
1.a显然不对，取非后对原文推导没有任何影响,而且你注意看funds must be raised to preserve at least those exhibits that will be most valuable to science in future.这句中的at least和 most valuable你也可以发现只是在most valuable情况下,才有economic consideration < perservation
2.b中对scope进行了错误的变化,限定词only原文都没有,不是假设的答案.
3.Goverment intrusion is in order to protect the right of individuals, so the relationship between these two is sweet (therefore, B is wrong-- "override"); while the real conflict is betweeen the government intrusion and the right of private business (therefore, C is right --"override")作者: elitist 时间: 2005-4-3 10:20
thanks !!!
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