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Until mow, only injectable vaccines against influenza have been available.Parents are reluctant to subject children to the pain of injections, but adults, who are at risk of serious complications from influenza, are commonly vaccinated.A new influenza vaccine, administered painlessly in a nasal spray, is effective for children.However, since children seldom develop serious complications from influenza, no significant public health benefit would result from widespread vaccination of children using the nasal spray.
Which of the following is an assumption on which the argument depends?
A.Any person who has received the injectable vaccine can safely receive the nasal-spray vaccine as well.
B.The new vaccine uses the same mechanism to ward off influenza as jnjectable vaccines do.
C.The injectable vaccine is affordable for all adults.
D.Adults do not contract influenza primarily from children who have influenza.
E.The nasal spray vaccine is mot effective when administered to adults.
（这道题为什么选D,而不是A...D跟题目没有关系呀）
The spacing of the four holes on a fragment of a bone flute excavated at a Neanderthal campsite is just what is required to play the third through sixth notes of the diatonic scale—the seven-note musical scale used in much of Western music since the Renaissance.Musicologists therefore hypothesize that the diatonic musical scale was developed and used thousands of years before it was adopted by Western musicians.
Which of the following, if true, most strongly supports the hypothesis?
A.Bone flutes were probably the only musical instrument made by Neanderthals.
B.No musical instrument that is known to have used a diatomic scale is of an earlier date than the flute found at the Neanderthal campsite.
C.The flute was made from a cave-bear bone and the campsite at which the flute fragment was excavated was in a cave that also contained skeletal remains of cave bears.
D.Flutes are the simplest wind instrument that can be constructed to allow playing a diatonic scale.
E.The cavebear leg bone used to make the Neanderthal flute would have been long enough to make a flute capable of playing a complete diatonic scale.
（此题答案是E，可是B不是更能说明diatonic musical scale was developed and used thousands of years before it was adopted by Western musicians？因为之前无人发现呀）
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发表于 2010-6-14 05:45:57
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