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China supplies more than 90 percent of the world's rare earth metals, but its reserves only ___

题目简介

China supplies more than 90 percent of the world's rare earth metals, but its reserves only ___

题目详情

China supplies more than 90 percent of the world's rare earth metals, but its reserves only _________
about one-third of the world's total.

[ ]

A. take up
B. make up
C. build up
D. polish up

题型：单选题难度：中档来源：江苏模拟题

答案

B

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