Such legal entities provide the means for international cooperation and support of macroprojects related to the moon and mars that encourage global private sector participation.

A．existences

B．vitalities

C．persistences

D．complicities

科技工作者的团结合作精神主要体现在（）方面。

A.合作意识

B.合作精神

C.互利互惠

D.独立自主