单项选择题According to the passage, the main difference between a homogeneous society and a heterogeneous one lies in
单项选择题The author uses the negotiations in Britain and Germany as an example to
单项选择题The author would most probably agree that changes are more likely to be successful in
单项选择题In addition to distinctive packaging, contemporary products should also
单项选择题The author's attitude towards future full employment is generally