【判断题】【消耗次数:1】
平面定轴轮系的传动比有正负。
正确
错误
参考答案:
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相关题目
【单选题】 对于平面定轴轮系来说,其传动比的正、负取决于()。
①  A.模数的大小
②  B.轴线的几何位置
③  C.外啮合的次数
④  D.首轮和末轮的齿数
【判断题】 定轴轮系的传动比等于始末两端齿轮齿数之反比。
①  正确
②  错误
【单选题】 定轴轮系的传动比大小与轮系中的惰轮的齿数____。
①  成正比
②  成反比
③  有关
④  无关
【单选题】 定轴轮系的传动比大小与惰轮的齿数()。
①  A.有关
②  B.无关
③  C.成正比
④  D.成反比
【多选题】 平面定轴轮系的传动比方向可以通过()和()两种方法来确定。
①  A.数外啮合次数
②  B.平移法
③  C.画箭头
④  D.转化法
【多选题】 混合轮系传动比的计算方法步骤包括()
①  A.基本轮系的划分
②  B.基本轮系传动比的计算
③  C.基本轮系间关系的寻找
④  D.方程组的联立求解
【单选题】 轮系的传动比,是指轮系中首轮与末轮的()或()之比。
①  A.传动角、压力角
②  B.中心距、位移
③  C.加速度、位移
④  D.角速度、转速
【判断题】 轮系传动不可获得很大的传动比。
①  正确
②  错误
【单选题】 周转轮系的传动比计算应用了转化轮系的概念。对应周转轮系的转化轮系乃是()。
①  定轴轮系
②  行星轮系
③  混合轮系
④  差动轮系
【判断题】 惰轮不但能改变轮系齿轮传动方向而且能改变传动比。
①  正确
②  错误
随机题目
【单选题】 The first American writer of local color to achieve wide popularity was?____.
①  Bret Harte
②  Mark Twain
③  Henry James
④  William Dean Howells
【单选题】 Mark Twain, one of the greatest 19th century American writers, is well known for his ______.
①  international theme
②  waste-land imagery
③  local colorism
④  symbolism
【单选题】 Who exerts the single most important influence on literary naturalism, of which Theodore Dreiser and Jack London are among the best representative writers?
①  Freud
②  Darwin
③  W. D. Howells
④  Emerson
【单选题】 _____ had an evident influence on naturalism. It seemed to stress the animality of man, to suggest that he was dominated by the irresistible forces of evolution.
①  Transcendentalism
②  Darwinism
③  Marxism
④  Freudianism
【单选题】 As a realist, Mark Twain concerned particularly about the local character of a region, which came about as “_________”.
①  Naturalism
②  Transcendentalism
③  Local Colorism
④  Both A and C
【单选题】 ______ is not the representative writer in the Age of Realism in the literary history of the United States.
①  Henry James
②  Ezra Pound
③  William Dean Howells
④  Mark Twain
【单选题】 Which of the following is not right about Mark Twain’s writing style?
①  ungrammatical and complicated
②  colloquial and concrete
③  remarkable humor
④  deep influence on contemporary writers
【单选题】 After the Civil War America was transformed from ______ to ______.
①  an agrarian community … an industrialized and commercialized society
②  an agrarian community … a society of freedom and equality
③  a poor and backward society … an industrialized and commercialized society
④  an industrialized and commercialized society … a highly developed society
【单选题】 Which of the following is NOT right about Mark Twains style of language?
①  His sentence structures are long, ungrammatical and difficult to read.
②  His words are colloquial, concrete and direct in effect.
③  His humor is remarkable and characterized by puns, straight-faced exaggeration, repetition and anti-climax.
④  His style of language had exerted rather deep influence on the contemporary writers.
【判断题】 The Transcendentalist group includes two of the most significant writers America has produced so far, Emerson and Henry David Thoreau.
①  正确
②  错误