【简答题】单词拼写。 1. He is a kind teacher and is r_______ by all his students. 2. China produces more crops and e_______ a lot to other countries. 3. F______ is the mother of success. 4. Costs have been r_______ ...
【单选题】游客在景区乘船游览时,景区讲解员的讲解应注意与( )有机结合。
【简答题】某螺纹联接,小批生产,其公称直径为24mm,螺距3mm,旋合长度为25mm,要求内、外螺纹有较高的同轴度,有较好的旋合性,且有一定的联结强度。试确定螺纹公差带代号。
【简答题】窄板弯曲后起横截面呈 形状。窄板弯曲时的应变状态是 的,而应力状态是
【简答题】Right now, Iran produces __________ cars than China.
【判断题】内、外螺纹的基本偏差数值除H和h外,其余基本偏差数值均与螺纹的旋合长度有关,而与公称直径无关。