In Steffens' eye Mr. Nixon was a good tutor because he encouraged his pupil to find answers to his own questions.
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The conversations of Mr. Nixon and his scholar friends always ended in consensus of opinion.
A. True
B. False
Steffens found his best preparation for college in listening to the conversations of Mr. Nixon and his scholar friends.
A. True
B. False
对恒速螺旋桨,收油门()。
A. 螺旋桨转速减小
B. 螺旋桨旋转阻力力矩不变
C. 桨叶角减小
对于变距螺旋桨,在其他条件不变时,油门越大,则螺旋桨的()。
A. 桨叶角越大
B. 桨叶角越小
C. 拉力越小
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