A.they don’t feed on pinyon seeds
B.they prevent the seeds being eaten
C.their waste can make the land rich
D.they are actually tree planters in a way
解析:选D。推理判断题。根据第二段的第一句“Jays(松鸦) are important spreaders of pinyon seeds.”以及该段的最后两句“But some seeds never get recovered.Instead可知从某种意义上说松鸦是食松的种植者。所以D项正确。 according to the passage?
A.Squirrels. B.Mice.解析:选B。细节理解题。根据第三段中的“They found quieter areas of the woodland were more likely to have jays and four times more with pinyon seedlings than loud regions.Meanwhile可知在比较安静的地区更可能有松鸦和更多的食松幼苗。与此同时生活在噪音较大的环境中的老鼠却会吃更多的种子。由此可推知老鼠可能不会受到噪音的威胁。________. environment
B.quiet places are good for pinyons to grow
C.jays hide pinyon seeds in quiet places
D.noisy places are good for pinyons to grow
解析:选B。推理判断题。根据第三段中的“They found quieter areas of the woodland were more likely to have jays and four times more with pinyon seedlings than loud regions.”可知安静的环境更适合食松的生长。所以答案为B项。文中提到噪音大的环境不会对老鼠有太大影响而没有说老鼠更喜欢生活在噪音大的环境里所以A项不正确;文中提到松鸦会把食松种子藏在不同的地方而没有说是安静的地方所以C项不正确。 the Pinyon
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