题目内容
During the ________ space flight, the Shenzhou circled the earth ________ 14 times.
[ ]
A.21-hours,不填
B.21-hour, for.
C.21 hours,/不填
D.21-hour,不填
答案:D
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题目内容
During the ________ space flight, the Shenzhou circled the earth ________ 14 times.
A.21-hours,不填
B.21-hour, for.
C.21 hours,/不填
D.21-hour,不填