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【简答题】
丁丁的座位是教室里最后一排的最后一个，其座位的位置也可以表示为（6， 8），你知道他们班一共有多少个学生吗？
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反馈参考答案：
举一反三
【单选题】Daniel has ________ CDs than Amy, but ________ DVDs than Paul. [ ]
A.
more; less
B.
more; fewer
C.
less; more
D.
fewer; less
【单选题】The civic library stocks a wide range of ______ materials, including books, DVDs, and CDs.
A.
educate
B.
educated
C.
education
D.
educational
【简答题】Tina goes to the store to purchase some CDs and DVDs. CDs cost $15 and DVDs cost $18. Which of the following expressions gives the total amount of money, in dollars, Tina will pay for purchasing 2 of ...
【单选题】With the fight against piracy ________, more and more people find that authentic CDs and DVDs deserve ________.
A.
furthered; buying
B.
furthered; to buy
C.
furthering; to be bought
D.
furthering; buying
【简答题】张三每月花300元购买DVDs和CDs。目前DVDs和CDs的价格都是10元/张，张三购买20张DVDs和10张CDs可以获得最大效用。假设张三用于消费DVDs和CDs的预算不变(仍为300元)，但DVDs的价格上涨为12元/张，而CDs的价格下跌为6元/张。和价格变化前相比，现在张三的境况变好了还是恶化了？应用预算约束一无差异曲线图加以说明。
【简答题】CDs, BDs, and DVDs come in several varieties. Please describe OM,?and W?versions of these types of media.
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