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问题
填空题
液液层析法分离样品,主要是利用样品的组分在两种互不相溶的液体间的()不同。
答案
参考答案:分配比
选择题
— How was your recent visit to Qingdao?
— It was great. We visited some friends, and spent the ____ days at the seaside.
A. few last sunny
B. last few sunny
C. last sunny few
D. few sunny last
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填空题
在国子监就读的外国学生叫“()”。
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