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刷刷题刷刷变学霸
举一反三
【单选题】Houses in 18th Century North America Seventeenth-century houses in colonial North America were simple structures that were primarily functional, carrying over traditional designs that went back to th...
A.
Wallpaper samples appeared in the architectural manuals.
B.
Wallpaper was the same color as the paints used.
C.
Patterned wallpaper was not widely used.
D.
Wallpaper was not used in stone houses.
【单选题】某口袋中有除颜色外其它都相同的红色、黄色、蓝色玻璃球共72个，小明通过多次摸球实验后，发现摸到红球、黄球、蓝球的频率依次为35%、25%和40%，估计口袋中有蓝色球多少个[ ]
A.
25
B.
29
C.
18
D.
39