在职攻硕英语考试

Byimmersingoreparticlesinwater,______.A．

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【单选题】By immersing ore particles in water, ______.


A．we can get ore particles of equal size
B．we can purify aluminum particles
C．we can filter out aluminum
D．we can improve the working conditions around


网考网参考答案：C
网考网解析：
[注释] 本题的依据是最后一句It is hoped that this technique will reduce the amount of high-grade aluminum the United States must import．显然，把矿粒浸入水中的做法目的只有一个，即提取铝。故选C。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>

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