滚珠螺母丝杠机构的传动效率较低，因为滚珠与丝杠和螺母磨擦产生大量的热。 - 查题网

>> 成人高等教育 / 机电一体化概论

成人高等教育 / 机电一体化概论

正确率：100%

滚珠螺母丝杠机构的传动效率较低，因为滚珠与丝杠和螺母磨擦产生大量的热。

A、正确
B、错误

积分

机电一体化概论

参考答案：

点击查看答案

佳题速递：

高等数学

计算机病毒主要是破坏数据的______。计算机应用基础

21、A: Hi, Sun Yan! What are you busy with these days? B: I'm busy _ _ _ 21 _ _ _ for the Spring Festival. A: What do you mean by the Spring Festival? B: Don't you know about the Spring Festival? It's _ _ _ 22 _ _ _ your Christmas holiday. It's the most important holiday in China. A: Oh, I see. _ _ _ 23 _ _ _ is the holiday? B: About one week long. A: What do you usually do during the holiday? B: Lots of things, such as eating and drinking, playing majiang, going to movies and temple fairs (庙会), visiting relatives and friends and so on. In many places people like to set off firecrackers (鞭炮). It is very interesting. But now it isn't allowed in some big cities because it is not safe. A: Do you eat special food for the holiday? B: Yes, we eat dumplings. A: Do children like the holiday? B: Sure. Children can have delicious food and wear new clothes. They can also get some money from their parents. A: What is that money for? B: This money is given to children for good luck by their parents or other senior people. Children can use the money _ _ _ 24 _ _ _ a lot of things for themselves. A: That's very interesting. Thank you for _ _ _ 25 _ _ _ me so much about the Spring Festival. B: It's pleasure.统考英语完型填空

1936年10月，红军三大主力胜利会师，结束了长征，会师地点是A、甘肃会宁B、陕北吴起镇C、陕北直罗镇D、四川懋功中国近现代史纲要

《马伶传》中马伶的经验说明( )(A) 文艺创作要获得成功，必须了解和热爱生活，到生活中去学习 (B) 作者对阉党的痛恨 (C) 作者是明末的遗老 (D) 一个人要想在事业上有所成就，就必须有吃苦耐劳、潜心钻研、精益求精的精神大学语文

_ _ _ _ find out what had happened. 英语（二）