【单选题】【消耗次数：1】
中心受压细长直杆丧失承载能力的原因为。（ ）
①
横截面上的应力达到材料的强度极限
②
压杆丧失直接平衡状态的稳定性
③
横截面上的应力达到材料的比例极限
④
横截面上的应力达到材料的屈服极限
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相关题目
【多选题】
横截面面积相等、材料不同的两等截面直杆，承受相同的轴向拉力，则两杆的( )。
①
轴力相同
②
横截面上的正应力也相同
③
轴力不同
④
横截面上的正应力也不同
⑤
线应变相同
随机题目
【判断题】
Audience is the only factor that a speaker/writer needs to consider when making a choice of words.
①
正确
②
错误
【判断题】
The most notable language variation is at the level of words people choose --- lexical variation.
①
正确
②
错误
【判断题】
An adverb collocation refers to a chunk that is often used adverbially, with or without an adverb in it.
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正确
②
错误
【单选题】
For formal English, we’d better NOT choose_______.
①
words of glorification
②
verbs of action
③
words of strength
④
peculiar words
【单选题】
“in addition to”is a/an_______ collocation.
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noun
②
conjunction
③
preposition
④
adverb
【单选题】
The figure of speech used in “The world is a stage”is_______.
①
simile
②
metaphor
③
paradox
④
allusion
【单选题】
When making a choice of words, speaker/writer needs to consider the following major factors EXCEPT_______.
①
audience
②
length of speech
③
purpose
④
formal and informal English
【判断题】
Homophones are two or more words that sound alike, but look different and have different meanings, such as “sea”and “see”.
①
正确
②
错误
【判断题】
All the free morphemes are lexical morphemes and all the bound morphemes are grammatical morphemes.
①
正确
②
错误