A、as fish does B、oil C、by the United States in the 19th century D、shines day and night E、only a very small percentage F、a limite

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问题 A、as fish does
B、oil
C、by the United States in the 19th century
D、shines day and night
E、only a very small percentage
F、a limited amount of the gold found there
________has become Alaska’s single important resource.

选项

答案B

解析 本句应该定位到第6段,主要是关于自然资源的介绍,段落中很清楚地提到了近些年来,阿拉斯加最重要的资源是石油。
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