信息商品市场的客体是指各类不同的信息()
A.商品和咨询
B.商品和服务
C.咨询和服务
D.咨询和转让
参考答案:B
在50千克水中加盐10千克,这时盐水的含盐率为20%.______.(判断对错)
His birthday is not _____ June. It's _____ Labour Day. [ ]
A. in, in
B. on, in
C. in, on