【多选题】【消耗次数:1】
保温棉的进场复检指标有()
A密度
B绝热结构
C含水率
D几何形状
E导热系数
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相关题目
【多选题】 保温棉的进场复检指标有()
①  A.密度
②  B.绝热结构
③  C.含水率
④  D.几何形状
⑤  E.导热系数
【多选题】 绝热材料的导热系数与含水率的不正确关系是()。
①  A含水率越大,导热系数越小
②  B导热系数与含水率无关
③  C含水率越小,导热系数越小
④  D含水率越小,导热系数越大
【单选题】 绝热材料含水率增加后,其导热系数将( )。
①  降低
②  增加
③  不变
④  视情况而定
【单选题】 体积密度大小与木材种类及含水率有关,通常标准含水率时的体积密度为准,其标准含水率为( )。
①  15%
②  25%
③  35%
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【单选题】 木材的含水量用含水率表示,指( )。
①  木材所含水的质量占木材干燥质量的百分率
②  木材所含水的质量占木材总质量的百分率
③  木材所含水的体积占木材总体积的百分率
④  木材所含水的体积占木材干燥后体积的百分率
【判断题】 吸水率就是含水率。 ()
①  正确
②  错误
【单选题】 导热系数λ小于( )的材料称为绝热材料。
①  0.13
②  0.32
③  0.12
④  0.23
【单选题】 悬着毛管水达到最大值时的土壤含水率称为()
①  A田间持水率
②  B饱和含水率
③  C凋萎系数
④  D 毛管断裂含水率
【简答题】 水的导热系数_____ 密封空气的导热系数,所以材料吸水后的绝热性能降低。
【单选题】 反映粘性土处于可塑状态时含水率变化范围的指标是()
①  塑限
②  液限
③  塑性指数
④  液性指数
随机题目
【单选题】 In William Cullen Bryant’s poem “Thanatopsis”, the title means______.
①  view of life
②  view of death
③  view of youth
④  world outlook
【单选题】 At the Reason and Revolution Period, Americans were influenced by the European movement called ______.
①  Chartist Movement
②  Romanticism Movement
③  Enlightenment Movement
④  Modernist Movement
【单选题】 The eminent English critic and poet, Matthew Arnold, called___“the most perfect brief poem in the language.”
①  Nature
②  To a Waterfowl
③  To Helen
④  The Wild Honey Suckle
【单选题】 Which of following can be said of the common features which are shared by the English and American Romanticists?
①  An increasing emphasis on the free expression of emotions.
②  An increasing attention to the psychic states of their characters.
③  An increasing emphasis on the desire to return to nature.
④  Both A and B.
【单选题】 The giant Moby Dick may symbolize all EXCEPT ______.
①  mystery of the universe
②  sin of the whale
③  power of the Great Nature
④  evil of the world
【单选题】 The convention of the desire for an escape from society and a return to nature in American literature is particular evident in ______.
①  Cooper’s Leatherstocking Tales
②  Hawthorne’s The Scarlet Letter
③  Whitman’s Leaves of Grass
④  Poe’s Black Cat
【单选题】 The Transcendentalist group includes two of the most significant writers America has produced so far, Emerson and ________.
①  Washington Irving
②  Nathaniel Hawthorne
③  Henry David Thoreau
④  Walt Whitman
【单选题】 Emily Dickinsons poetic idiom is noted for the following except .
①  brevity
②  directness
③  plainest words
④  obscure
【单选题】 Which of the following is not written by Herman Melville? ____
①  Typee and Omoo
②  Mardi and White Jacket
③  The Bostonians and American Tragedy
④  Moby-Dick and Pierre
【单选题】 Which is not connected with Thomas Paine?
①  Common Sense
②  The American Crisis
③  The Rights of Man
④  The Ambassadors