詹家东院住的是谁（）
A、淑娟
B、爱娟
C、奶娘
D、詹家老爷
参考答案：B
--- Good news. Li Na has become the first woman to reach a Grand Slam final.
---Fantastic! Nothing sounds _________.
A．good
B．best
C．better
D．worse
甲、乙两个实心铁球，已知甲、乙两球的质量分别是2kg和6kg，则甲、乙两球的体积之比为______，密度之比为______．
