问题
选择题
The successful launch of Tiangong1 symbolizes a further step for China to join in the________of space stations previously mastered by Russia and the US.
A．invention
B．production
C．operation
D．preparation
答案
答案：C
考查名词辨析。句意：“天宫1号”的成功发射使中国向空间站的运作更近了一步，空间站技术先前只有俄罗斯和美国掌握。operation“运行，操作”，符合语意。