the space shuttle Discovery completed a______ mission upon its return to Kennedy Space Centre.

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问题 the space shuttle Discovery completed a______ mission upon its return to Kennedy Space Centre.
The space shuttle Discovery made a rare night landing at the Kennedy Space Centre early on Thursday. The night landing, the 11th in the Centre’s 94 shuttle missions, ended a 10-day mission to outfit the orbiting International Space Station.
   Although the spacecraft created a sonic boom that could be heard along much of Florida’ s eastern seaboard, witnesses on the ground could not see the orbiter until it was directly over the runway lights.
   Scattered showers off the Florida coast had threatened to postpone the shuttle’ s return, but forecasters gave the green light when they decided no rain would fall within 48 kilometres of the space center.

选项 A、11-day
B、94-day
C、10-day
D、49-day

答案D

解析 只有选项D在报道中未曾提及,因此为正确答案。
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