甲、乙、丙三人去买书，他们买书的本数都是两位数字，且甲买的书最多，丙买的书最少，又知这些书的总和是偶数，他们的积是3960，那么乙最多买（）本书
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We can describe Citigroup as______.
A. Citicorp's combination with Travelers
B. a merger of Citigroup and Travelers
C. a company selling insurance policies
D. a rating agency based on Citicorp
当屋面坡度大于（）%时称为坡屋面。
A. 8
B. 15
C. 10
D. 12
The present enchantment of Weatherman in the youth is mainly because of______.
A. the active and wide propaganda of Sam Green in those people under 40
B. the tight relation between the relative global stability and its activities
C. the two novels that narrate the job and nature of the underground
D. the persistent power to inspire devotion and enthusiasm of this group
用方形地砖铺一块正方形地面，四周用不同颜色的地砖加以装饰，用47块不同颜色的砖装饰了这块地面相邻的两边。这块地面一共要用（）块砖
A. 324
B. 576
C. 891
D. 1024
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