Since three Chinese astronauts piloted Shenzhou IX to link up with Tiangong-l, C

题干

Since three Chinese astronauts piloted Shenzhou IX to link up with Tiangong-l, China's exploration of outer space has reached new stage．

A．不填；a	B．the; a
C．a：the	D．不填：不填

上一题下一题 0.64难度单项选择更新时间:2014-12-26 08:10:10

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