质点的达朗贝尔惯性力的大小等于其质量与其加速度的乘积。对错

>> 国家开放大学 / 工程力学（汽车）

国家开放大学 / 工程力学（汽车）

正确率：100%

质点的达朗贝尔惯性力的大小等于其质量与其加速度的乘积。

对

错

积分

工程力学（汽车）

参考答案：

点击查看答案

佳题速递：

( )的着眼点是组织和公众及其相互关系。市场营销组织传播公共关系公益广告广告学概论

80、要显示要素之间的主从关系和统一变化的效果是（）。 A.设计方向 B.造型语言 C.字号大小 D.表现手段设计学原理

签订合同后，如发生（），违约方可以援引不可抗力条款要求免责。战争世界市场价格上涨货币贬值生产过程中的过失贸易实务

题型描述: 阅读理解Why do men die earlier than women? The latest research makes it known that the reason could be that men’s hearts go into rapid decline when they reach middle age.The largest study of the effects of aging on the heart has found that women’s longevity may be linked to the fact that their hearts do not lose their pumping power with age.“We have found that the power of the male heart falls by 20-25 percent between 18 and 70 years of age,” said the head of the study, David Goldspink of Liverpool John Moores University in the UK.“Within the heart there are millions of cells that enable it to beat. Between the age of 20 and 70, one-third of those cells die and are not replaced in men,” said Goldspink. “This is part of the aging process.”What surprises scientists is that the female heart sees very little loss of these cells. A healthy 70-year-old woman’s heart could perform almost as well as a 20-year-old one’s.“This gender difference might just explain why women live longer than men,” said Goldspink, “The team has yet to find why aging takes a greater loss on the male heart.”The good news is that men can improve the health of their heart with regular exercise.1、 The underlined word “decline” in the first paragraph probably refers to “ _ _ _ _ _ _ _ _ ”. A. health B. refuse C. effect D. weakening 2、 The text mainly talks about _ _ _ _ _ _ _ _ . A. women’s aging process B. the gender difference C. men’s heart cells D. hearts and long life 3、 According to the text, the UK scientists have known that _ _ _ _ _ _ _ _ . A. women never lose their pumping power with age B. the female heart loses few of the cells with age C. women can replace the cells that enable the heart to beat D. women have more cells than men when they are born 4、 If a man wants to live longer, he can _ _ _ _ _ _ _ _ . A. enable his heart to beat much faster B. find out the reason for aging C. prevent his cells from being lost D. exercise regularly to keep his heart healthy 5、 “Why ageing takes greater loss on the male heart” probably mean that _ _ _ _ _ _ _ _ . A. why it takes more time for male heart to get old B. why it takes more money on the male heart to get old C. why the male heart loses more of the cells than female in the process of getting old D. why male heart suffers more than female heart on their way of getting old统考英语A

示波器和记录仪可对采用特殊附加专业转换器后也可以对以下的非电量信号进行时域分析（下面所列的①②③④个选项，至少有2项是正确的。点击你认为正确的选项组合） ①压力 ②转速 ③气味 ④振动①②③ ①②④ ①③④ ②③④汽车故障诊断技术

Excel 中运算符包括 Excel数据分析