①白铁(铁上镀锌)②马口铁(铁上镀锡)③铜质奖章(铁上镀铜),当镀层破坏后,铁腐蚀速率由快到慢的顺序是 [ ]
A.③①②
B.②①③
C.③②①
D.①②③
答案:C
My wife cares more for new clothes than anything else in the world, so she is very _______ about what she wears.
A.special
B.strict
C.especial
D.particular
需求法则可以表示为:( )。
A.价格越高,需求量越小;价格越低,需求量越大B.价格越高,供给量越小;价格越低,供给量越大C.价格越高,需求量越大;价格越低,需求量越小D.价格越高,供给量越大;价格越低,供给量越小