【单选题】下列有关稳态扩散与非稳态扩散说法不正确的是()
A.
非稳态扩散过程中扩散范围不断扩展,不存在确定的扩散层厚度
B.
稳态扩散有确定的扩散范围,存在确定的扩散层厚度
【判断题】Little Nutbrown Hare can hop higher than Big Nutbrown Hare.( )
【单选题】—Jane said everyone lowered their heads,without saying a word at the beginning of your party; then was there one who________? —Johnny told a joke and made us burst out laughing.
【单选题】1认清和解决革命问题的基本依据是( )。
【判断题】Big Nutbrown Hare loves Little Nutbrown Hare very much( )
【简答题】在某城市买房的收入弹性为0.8-1.2之间,如果居民收入平均每年增加5%,问第二年对住房的需求量会增加 。