According to the passage,the earliest colonial ventures
A. generated huge profits.
B. caused great financial losses.
C. rewarded the investors heavily.
D. repaid the investor’s principal.
第7题
电动操舵装置中缓冲弹簧的作用是:()
A.控制舵扇运动
B.传递转舵力矩并吸收波浪对舵的冲击力
C.连接舵柄与舵扇
D.方便拆解检修
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