观察时机的选择首先要考虑到( )
A.观察对象
B.观察机会
C.观察条件
D.观察的目的
正确答案是D
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Passage Two Chinese bike-sharing major Mobike said onTuesday that it will launch services in the United Kingdom in Manchester andSalford at the end of this June as it ramps up efforts to compete with rivalssuch as ofo in