市场观察法经常被用来判断以下哪些情况()
A.商品资源观察
B.顾客观察
C.服务态度观察
D.营业状况观察
E.商品库存观察
参考答案:A, B, C, D, E
下列除哪项外,都是生物圈的表现( )
A.蜻蜓点水
B.种子萌发
C.森林着火
D.人的呼吸
We ______ each other since the year of 1948.[ ]
A. have got to know
B. have known
C. got to know
D. knew