单项选择题

下面的哪一种说法是正确的？

A．故事点是一个绝对度量单位
B．故事点估算一定要做到非常精确
C．故事点表示开发一个用户故事或特性的复杂度
D．故事点表示开发一个用户故事或特性所要付出的工作量

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电子标签也称为射频标签或应答器，由耦合元件、芯片以及天线组成，每个标签具有独一无二的电子编码，一般附着在被标识的物体表面，是RFID的数据信息载体。

答案：正确

多项选择题

Which statements about withdrawal of recognition are correct?
A、Recognition de facto has ever accorded by a state can not be withdrawn.
B、Withdraw of recognition is usually found in the situation where a de facto government of a state losses its effective control over the state.
C、The ever-recognizing state may withdraw the recognition de facto to the recognized government.
D、The de jure recognition of a government may be revoked by a recognizing state only where the new regime comes to power and the previous government is not in existence.