问题 问答题 简答题

平衡潮的基本思想?

答案

参考答案:海面在月球和太阳引潮力的作用下离开原来的平衡位置,作相应的上升或下降运动,直到在重力场和引潮力场中达到新的平衡位置为止。从而,海面便产生变形。

因为在地球表面上离月亮最近和最远的两点,其引潮力的作用使重力加速度减小,因此,海面稍微升高;而对于垂直于地月连线的点上来说,引潮力使得重力加速度增加,海面降低。因此,海面产生变形。考虑引潮力后的海面变成了椭球形,称之为潮汐椭球。由于地球的自转,地球表面相对于椭球形的海面运动,这就造成了地球表面的固定点发生周期性的涨落而形成潮汐,这就是平衡潮理论的基本思想。

完形填空
The New York Times published an article recently that shows great regret for the "death of conversation".It suggests that while technology such as cell phones, e-mails, and Internet posting makes us feel more  36  than ever, they’re also driving us  37  from people around us.
Users get final connectivity  38  the price of  39  face-to-face conversation. Sherry Turkle, author of the article in The New York Times says people are  40  to a different way of being “alone together”.
Actually ,  41  text messages or writing micro-blogs allows us to  42  thoughts.
 43  bits and pieces of online cannot  44  a “real conversation.” Lan Guo, 19, a freshman English major from Changsha University , said that she would like to hear people’s tone of voice and see their faces in a (n)  45 . “The give and take of ideas in a conversation sharpens our minds.” she said. She also mentions that  46  ourselves in mobile technology reduces our chance of starting conversations with strangers and  47  people.
Turkle mentioned the popular  48  of “I share, therefore I am ”among this generation. Liu Xuan, a young writer from Taiwan and psychology graduate from Harvard University, thinks it’s a mindset adopted by most young people. They are so busy creating or polishing their online persona (网络人格)that they forget how to live a (n)  49  life. For example, They may  50  more about blogging about attending a party rather than enjoying being  51 .
 52 , experts remind us that it’s unfair to blame mobile technology . Chen Chen, a sociology expert at China Youth &Children Research Center, points out that it is still owners of gadgets , such as cell phones and tablets , who’re avoiding personal  53 . We take advantage of these devices to hide ourselves  54  others. Texting messages or calling may be a (n)  55  to avoid contact with others, such as having eye contact. “Only by strengthening conversation can we understand each other. Simply throwing away the mobile gadgets is not a solution.” she said.
小题1:
A.received B.sharedC.connectedD.respected
小题2:
A.off B.backC.awayD.down
小题3:
A.beyondB.atC.forD.above
小题4:
A.havingB.riskingC.sacrificingD.sharing
小题5:
A.relatedB.committedC.devotedD.accustomed
小题6:
A.sending B.gettingC.readingD.taking
小题7:
A.change B.exchangeC.deliverD.raise
小题8:
A.SoB.AndC.OrD.But
小题9:
A.indicateB.replaceC.coverD.involve
小题10:
A.conversationB.computerC.partyD.Internet
小题11:
A.abandoningB.joiningC.buryingD.attaching
小题12:
A.interviewingB.introducingC.knowingD.meeting
小题13:
A.feelingB.conceptC.factD.truth
小题14:
A.colorfulB.interestingC.realD.meaningful
小题15:
A.worryB.careC.askD.debate
小题16:
A.thereB.outC.downD.in
小题17:
A.ThereforeB.AltogetherC.InsteadD.However
小题18:
A.informationB.spaceC.contactD.management
小题19:
A.fromB.ofC.behindD.under
小题20:
A.approachB.sourceC.resultD.excuse
判断题