【简答题】弯曲变形的特点是是主要变形区,且在弯曲前后长度保持不变
【单选题】听力原文:W: I left my office at 4.-30. what time is it now? M: Just five o'clock, but my watch is five minutes faster. Q: How long ago' did the woman leave her office? (14)
【多选题】弯曲变形前后 ( ) 保持不变,所以弯曲件展开长度的计算以此为依据。
【简答题】弯曲变形的特点是是主要变形区,且 应变中性层在弯曲前后长度保持不变
【判断题】名片是现代人社交中必备的工具之一,是自我介绍信和社交联谊卡。