题目内容

燃烧的必要条件为()
A燃料、氧气、风速
B燃料、热源、氧气
C燃料、热源、风速
D热源、氧气、风速

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听力原文： Well-Qualified Candidates Find Jobs
Employment opportunities for computer operators, computer programmers, and computer systems analysts / are expected to grow throughout the 1980s and beyond / as more and more areas of the private and public sector / become equipped for computer technology. / While some computer operators do not have college degrees, / employers prefer applicants who have had college training. / Courses in data processing, accounting, and business administration / are needed for those who want to become fully qualified programmers. / U. S. Government statistics project an expected 20,000 opening nationwide / for computer operators and programmers through 1990, / with another 8,000 openings for systems analysts / who have had some experience and further education.
(1)

现代民航客机的发动机一般采用何种供油方式()
A重力供油
B油泵供油
C压力供油
D自动供油

飞行操纵系统的组成部分为()
A主操纵系统、辅助操纵系统、警告系统
B主操纵系统、辅助操纵系统、传动系统
C主操纵系统、传动系统、警告系统
D辅助操纵系统、传动系统、警告系统

机翼干舱的目的为()
A储存燃油
B维持油箱内外气压平衡
C防止失火
D减轻飞机重量