纸币产生于货币的（）
A.价值尺度职能
B.流通手段职能
C.支付手段职能
D.贮藏手段职能
参考答案：B
North Korea has always sought for a direct talk with the US, without China ________.
A．involving
B．to involve
C．involved
D．be involved
下列哪项不属于血小板的细胞器（）
A.高尔基复合体和线粒体
B.a颗粒和糖原颗粒
C.致密颗粒和溶酶体颗粒
D.微管和微丝
