易燃液体的密度越小,其挥发()。
A、越慢
B、越快
C、与密度无关
D、不确定
参考答案:B
芒硝炮制时可用
A.清炒法B.发芽法C.复制法D.提净法E.发酵法
The following table gives statistics showing the aspects of quality of life in five countries. Write a report for a university lecturer describing the information in the table below.