下列描述中，属于金属化学性质的是[ ]
A．铜是紫红色固体
B．汞在常温下呈液态
C．铝能与酸反应
D．钠的质地较软
答案：C
Spring Festival on January lst in China every year. [ ]
A. is celebrated
B. was celebrated
C. will celebrate
D. is celebrating
离心式风机按压力不同可分为低压、中压和（）三种。
