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A team of researchers has found that immunizing patients with bee venom instead of with the bees’ crushed bodies can better prev
A team of researchers has found that immunizing patients with bee venom instead of with the bees’ crushed bodies can better prev
admin
2010-10-14
78
问题
A team of researchers has found that immunizing patients with bee venom instead of with the bees’ crushed bodies can better prevent serious and sometimes fatal sting reactions in the more than one million Americans who are hypersensitive to bee stings. The crushed-body treatment has been standard for fifty years, but a report released recently said that it was ineffective. The serum made from the crushed bodies of bees produced more adverse reactions than the injections of the venom did.
The research compared results of the crushed-body treatment with results of immunotherapy that used insect venom and also with results of a placebo. After six to ten weeks of immunization, allergic reactions to stings occurred in seven of twelve patients treated with the placebo, seven of twelve treated with crushed body extract, and one of eighteen treated with the venom.
The most successful treatment described in the passage was a serum prepared from ______.
选项
A、the blood of patients who have been stung
B、poison extracted from bees
C、crushed bodies of bees
D、a placebo and a crushed-body extract
答案
B
解析
重要句题。从文中第二段第二句说明用毒液防治会更有效。A项病人的血文中未提。C、D都在最后一段最后一句对比中无毒液防治有效。
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0
大学英语四级
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