问题
问答题 简答题
摩擦学设计的任务就是
答案
参考答案:
利用摩擦学的现有知识,对一个特定对象通过合理的设计方法使其获得良好的摩擦学性能。
摩擦学设计的任务就是
参考答案:
利用摩擦学的现有知识,对一个特定对象通过合理的设计方法使其获得良好的摩擦学性能。
补全对话根据对话内容,从方框中选择最佳选项(其中有两项多余)。 | |
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A: Can I help you? B:Yes, please. Today is Mother's Day.____1____but I have no idea what to buy.. A: ____2_____ B: Great ! But ____3____ roses or carnations (康乃馨)? A: I think carnations are better. They show happiness, sweetness and love. They are for mothers. B : How much are they? A: ___4_____ B: OK. I'II take it. ____5_____ A: Thank you and best wishes to your mother. |