慢性肾衰竭的超声表现为两肾体积（），肾皮质回声（）。
参考答案：缩小；增强
There is ________ in his words. We should have a try. [ ]
A. something
B. anything
C. nothing
D. everything
体积为0.9m3的冰熔化成水后，质量为______kg，体积为______m3．
