In aerospace devices the weight of the necessary power producing equipment is _____.
A. vital B. possible C. capable D. reliable
In aerospace devices the weight of the necessary power producing equipment is _____.
A. vital B. possible C. capable D. reliable
A
vital 极其重要的。本题译文:在航空航天装置中必要的动力设备的重量问题是至关紧要的。