After several ______.attempts to send the missile into space, the spacecraft was

游客2025-05-06 7

问题 After several ______.attempts to send the missile into space, the spacecraft was finally launched successfully.

选项 A、abortive
B、difficult
C、experimental
D、preliminary

答案 A

解析 (abortive流产的，失败的)。句意为：把导弹发射到太空中去的几次尝试失败以后，宇宙飞船的发射终于取得成功。B．difficult困难的；C．experimental实验性的；D． preliminary预备的，初步的。

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Afterseveral______.attemptstosendthemissileintospace,thespacecraftwas