国开在线答案
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2022-09-12
[简答] 二、阅读理解：阅读下面的短文，根据文章内容进行判断，正确为“T”，错误为“F”。Ofallthewebsites,onethathasattractedattentionrecentlyismyspace.com.Mostofthisattentionhascomefromthehacksisindeedatoughreality,shuttingdownthesiteisnottheanswer.Ifmyspace.comshutdown,anothersitewouldplace.Therefore,therightwayistoteachteenshowtousethesitesafelyandeducatethem.Oneofthegoodwayistochangetheprivacysettingonyourprofileto“private”actuallyposttheirhomeandschooladdresses,dateofbirth,andsoon,oftenpredatorsknowexactlywheretheywillbeThemostinformationthatissafeisyourfirstnameandprovince.Anythingmoreisbasicallylife.Anotherbigproblemisphotos.Isuggestskippingphotosandneverpostingaphotoofafriendonlinewithouthisorherhowwellyouthinkyouknowthisperson.Therearenoguaranteesthattheyhavetoldthetruth.1. Mostofthisattentionhascomefromthehacksisindeedatoughreality,shuttingdownthesiteisnottheanswer.2. Oneofthegoodwayistochangetheprivacysettingonyourprofileto“private”actuallyposttheirhomeandschooladdresses,dateofbirth,andsoon.3. Ifmyspace.comshutdown,anothersitewouldplace.Therefore,therightwayistoteachteenshowtousethesitesafelyandeducatethem.4. Anotherbigproblemisphotos.Isuggestskippingphotosandpostingaphotoofa friendonlinewithouthisorherhowwellyouthinkyouknowthisperson.5. Therearenoguaranteesthattheyhavetoldthetruth.
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2022-09-12
[判断] 通过离合器联接的两轴可在工作中随时分离。
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2022-09-12
[判断] 通过连轴器联接的两轴可在工作中随时分离。
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2022-09-12
[判断] 对高精度零件淬火后要进行冷处理，目的是尽量减少过冷奥氏体。（ ）
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2022-09-12
[单选] 对于退火难以软化的某些合金钢，在淬火后常采用（ ）回火，使钢中碳化物适当聚集，降低硬度，以利于切削加工。
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2022-09-12
[单选] 感应加热表面淬火后，为了降低淬火应力、保持高的硬度和耐磨性，要进行（ ）回火。
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2022-09-12
[判断] 氮化和渗碳相比，氮化温度低，故变形大。（ ）
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2022-09-12
[判断] 组成转动副的两构件之间的接触形式，只有平面接触。
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2022-09-12
[单选] 如下图所示，图中A点处形成的转动副数为_______个。472817/1.png
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2022-09-12
[单选] 机构具有确定相对运动的条件是_______。
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