city light有兩個不同的玻璃杯(兩個杯子都接近圓柱體),兩個都裝有一定量的水,A杯的水位比B杯高五厘米。A杯的底部沉沒著一個石塊,當石塊被取出並放入B沉沒后,B杯水位上升了五厘米,並且比這時A杯的水位還高十厘米。則得知A杯與B杯的底面積之比為多少?
從甲地到乙地首尾包括,一共有十五個車站,這些車站上有四條線路運行,其中A線路從第一站到第六站,B線路為第三站到第十站,C線路為第七站到第十二站,D線路為第十站到第十五站。
city light從甲地到乙地,要在線路中換乘,不在兩站步行也不往反方向乘坐,每個線路只坐一次,有多少種方式?
下面的一段話中隱藏著幾種美國硬幣的英文名稱。你能找到嗎?(答案按照出現順序排列)
Elise was worried. Because of the poor lighting in the dim entry of the ballroom, her worst fears were about to happen: nylons torn and broken heels. Her date was about to nick electrical wires that were sticking out from a light fixture, but Elise pulled him away at the last second.