下列现象属于扩散的是[ ]
A.打开香水瓶,香味四处飘逸
B.拍打衣服时灰尘纷纷落地
C.放在空气中的铁块,过一段时间生锈了
D.冰熔化
答案:A
-__________ there a lot of students on the football field?
-No, there __________.[ ]
A. Are, aren't
B. Is, isn't
C. Are, isn't
D. Is, aren't
我国实行适度宽松的货币政策,降低存款利率不利于()
A.增加储蓄存款
B.刺激消费
C.扩大内需
D.拉动经济增长