拆下机油滤清器侧面的封油螺帽，松开紧固螺母，旋出调压螺钉，则机油压力()。
A. 降低
B. 升高
C. 可能降低，也可能升高
D. 以上答案都不正确
使用软连接牵引装置时,牵引车与被牵引车之间的距离应为()m。
A. 4~10
B. 6~15
C. 4~20
D. 10~20
中国共产党的最高理想和最终目标是（）。
A. 实现共产主义
B. 建设中国特色社会主义
C. 全面建成小康社会
The difference in production outcomes between monopolistic firms and purely competitive firms is best explained by the fact that:
A. the profit maximizing output level for monopolists occurs at lower levels of production than for purely competitive firms
B. monopolists maximize profits by setting output such that marginal revenue exceeds marginal cost
C. monopolists maximize profits by setting output such that marginal revenue is maximized
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