2020年解放軍文職人員考試物理知識(shí):關(guān)于超重和失重-解放軍文職人員招聘-軍隊(duì)文職考試-紅師教育
發(fā)布時(shí)間:2020-03-11 17:40:53關(guān)于超重和失重:在平衡狀態(tài)時(shí),物體對(duì)水平支持物的壓力大小等于物體的重力.當(dāng)物體在豎直方向上有加速度時(shí),物體對(duì)支持物的壓力就不等于物體的重力.當(dāng)物體的加速度方向向上時(shí),物體對(duì)支持物的壓力大于物體的重力,這種現(xiàn)象叫超重現(xiàn)象.當(dāng)物體的加速度方向向下時(shí),物體對(duì)支持物的壓力小于物體的重力,這種現(xiàn)象叫失重現(xiàn)象.對(duì)其理解應(yīng)注意以下三點(diǎn):(1)當(dāng)物體處于超重和失重狀態(tài)時(shí),物體的重力并沒(méi)有變化.(2)物體是否處于超重狀態(tài)或失重狀態(tài),不在于物體向上運(yùn)動(dòng)還是向下運(yùn)動(dòng),即不取決于速度方向,而是取決于加速度方向.(3)當(dāng)物體處于完全失重狀態(tài)(a=g)時(shí),平常一切由重力產(chǎn)生的物理現(xiàn)象都會(huì)完全消失,如單擺停擺、天平失效、浸在水中的物體不再受浮力、液體柱不再產(chǎn)生向下的壓強(qiáng)等.
解放軍文職招聘考試綢繆-解放軍文職人員招聘-軍隊(duì)文職考試-紅師教育
發(fā)布時(shí)間:2017-07-02 18:53:29綢繆束薪,三星在天。今夕何夕?見(jiàn)此良人。子兮子兮!如此良人何!綢繆束芻,三星在隅。今夕何夕?見(jiàn)此邂逅。子兮子兮!如此邂逅何!綢繆束楚,三星在戶。今夕何夕?見(jiàn)此粲者。子兮子兮!如此粲者何!1、綢繆(綢謀ch u m u):猶 纏綿 ,緊緊捆縛的意思。詩(shī)人似以束薪纏綿比喻婚姻。2、三星:指參星。天:古音tīn。3、今夕何夕:是驚喜慶幸之辭,言今晚是不同尋常的夜晚。4、良人:猶言 好人 ,這里是男稱女。5、子兮子兮:詩(shī)人感動(dòng)自呼之辭。6、如:猶 奈 。如此良人何:是喜不自禁之辭,言愛(ài)這 良人 愛(ài)得無(wú)可奈何。7、芻:草。8、隅:房角。三星在隅:言三星稍偏斜,對(duì)著房角?!都瘋鳌罚?昏現(xiàn)之星至此,則夜久矣。9、邂逅:喜悅。這里為名詞,謂可悅之人。10、在戶:言當(dāng)面而見(jiàn)?!都瘋鳌罚?戶必南出,昏現(xiàn)之星至此,則夜分矣。11、粲:鮮明。粲者:猶言 漂亮人兒 ?!锻ㄡ尅罚?見(jiàn)此粲者,見(jiàn)其女也。這是樂(lè)新婚的詩(shī)。詩(shī)人覺(jué)得他的新娘子美不可言,那夜晚也是美不可言,喜不自勝,簡(jiǎn)直不曉該怎么辦好。柴枝捆得緊緊,抬頭正見(jiàn)三星。今晚是啥夜晚?見(jiàn)著我的好人。你看,你看啊!把這好人兒怎么辦?。【o緊一把芻草,三星正對(duì)房角。今晚是啥夜晚?心愛(ài)人兒見(jiàn)著。你看,你看??!把這心愛(ài)的怎么辦?。∏G樹(shù)條兒緊纏,三星照在門前。今晚是啥夜晚?和這美人相見(jiàn)。你看,你看??!把這美人兒怎么辦??!
解放軍文職招聘考試肥胖-解放軍文職人員招聘-軍隊(duì)文職考試-紅師教育
發(fā)布時(shí)間:2017-06-28 14:26:29肥胖已經(jīng)成為危害人們健康的嚴(yán)重問(wèn)題,中小學(xué)生的肥胖趨勢(shì)更為明顯。你們班對(duì)此展開(kāi)討論。根據(jù)不同的觀點(diǎn),寫(xiě)一篇100詞左右的短文。1.肥胖危害健康,應(yīng)該節(jié)食,鍛煉,預(yù)防肥胖。已經(jīng)超重的,應(yīng)該采取措施減肥。2.中學(xué)生長(zhǎng)身體的時(shí)候,減肥會(huì)影響身體發(fā)育,也會(huì)影響學(xué)習(xí),因此應(yīng)該順其自然。肥胖:fatnessFatness is one of the serious problems which have a bad effect on our health. And at present the situation in the teenagers is even worse, As to this, a discussion was carried out in our class.Some students think fatness does harm to our health, so it is necessary to be on a diet and take suitable exercise to prevent it. Those who are overweight should take measures to lose weight to be healthy.But others have a different opinion. They say losing weight will he bad for the teenagers during their growth course, as well as their studies. So there is no doubt to leave it as it is.