2009年12月大学英语四级真题试卷及参考答案

“No one can take one-sided action,” says Laird, who is exploring whether to seek an exemption(豁免)from federal anti-trust laws so member colleges can discuss how they could jointly reduce merit aid, “This is a merry-go-round that’s going very ...

This was scientifically disproven by research which found that all taste sensations come from all regions of the tongue, although different parts are more sensitive to cert...

Some also blame their parents—their genes. But unfortunately, the parents are wronged because they’re normal in shape, or rather slim. It’s a similar story around the world, although people are relatively unlikely to have tried to lose weight. P...

Parameterizations capture radiative, convective and diffusive effects in the atmosphere and at the interface between the atmosphere and the surface, and are often determine...

19. Six out of every ten prisoners in chains are black, which is ___ the chain gangs call up images of slavery in centuries gone by. A. where B. when C. what D. why 20.Robots differ from automatic machines ___ after completion of one specific task,...

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