题干

如图所示,在平面直角坐标系中,半径均为1个单位长度的半圆O1、O2、O3,…组成一条平滑的曲线,点P从原点O出发,沿这条曲线向右运动,速度为每秒π
2
个单位长度,则第2015秒时,点P的坐标是(  )
 

A:(2014,0)

B:(2015,﹣1)

C:(2015,1)

D:(2016,0)

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答案(点此获取答案解析)

B

同类题2

阅读下面的文言文,完成后面题目。

    王舒,字处明,丞相导之从弟也。父会,侍御史。舒少为从兄敦所知,以天下多故,不营当时名,恒处私门,潜心学植。年四十余,州礼命,太傅辟,皆不就。及敦为青州,舒往依焉。时敦被征为秘书监,以寇难路险,轻骑归洛阳,委弃公主。时辎重金宝甚多,亲宾无不竞取,惟舒一无所眄,益为敦所赏。

    时将征苏峻,司徒王导欲出舒为外援,乃授抚军将军、会稽内史,秩中二千石舒上疏辞以父名,朝议以字同音异,于礼无嫌。舒复陈音虽异而字同,求换他郡。于是改“会”字为“郐”,舒不得已而行。在郡二年而苏峻作逆,乃舒节都督,行扬州刺史事。时吴国内史庾冰弃郡奔舒,舒移告属县,以吴王师虞斐为军司,率众一万,与庾冰俱渡浙江。前义兴太守顾众、护军参军顾飏等,皆起义军以应舒。舒假众扬威将军、督护吴中军事,飏监晋陵军事,于御亭筑垒。峻闻舒等兵起,乃赦庾亮诸弟,以悦东军。舒率众次郡之西江,为冰、飏后继。冰、飏等遣前锋进据无锡,遇贼将张健等数千人,交战,大败。贼遂入吴,烧府舍,掠诸县,所在涂地。舒遣子允之行扬烈将军,与将军徐逊、陈孺及扬烈司马朱焘,以精锐三千,轻邀贼于武康,出其不意,遂破之。斩首数百级,悉委舟步走。是时临海、新安诸山县并反应贼,舒分兵悉讨平之。会陶侃等至京都舒等并以屡战失利移书盟府自贬去节侃遣使敦喻不听。及侃立行台,上舒监浙江东五郡军事,允之督护吴郡、义兴、晋陵三郡征讨军事。既而晃等南走,允之追蹑于长塘湖,复大破之。贼平,以功封彭泽县侯,寻卒官。赠车骑大将军、仪同三司,谥曰穆。

(选自《晋书》列传第四十六)

同类题4

根据短文内容, 从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    Doctors say anger can be an extremely damaging emotion, unless you learn how to deal with it. They warn that anger can lead to heart disease, stomach problems, headaches, emotional problems and possibly cancer.

    ____ Some people express anger openly in a calm reasonable way. Others burst with anger, and scream and yell. But other people keep their anger inside. They can not or will not express it. This is called repressing anger.

    For years many doctors thought that repressing anger was more dangerous to a person's health than expressing it. They said that when a person is angry, the brain releases the same hormones (荷尔蒙). They speed the heart rate, raise blood pressure, or sugar into the blood, etc.____

    Some doctors say that both repressing and expressing anger can be dangerous. They believe that those who express anger violently may be more likely to develop heart disease, and they believe that those who keep anger inside may face a greater danger of high blood pressure.

    ____ They say the first step is to admit that you are angry and to recognize the real cause of the anger, then decide if the cause is serious enough to get angry about. If it is, they say, “____ Wait until your anger has cooled down and you are able to express yourself calmly and reasonably.”

    Doctors say that a good way to deal with anger is to find humor in the situation that has made you angry. ____

A. In general the person feels excited and ready to act.

B. They said that laughter is much healthier than anger.

C. Expressing anger violently is more harmful than repressing it.

D. Anger may cause you a cancer.

E. Do not express your anger while angry.

F. Anger is a normal emotion that we all feel from time to time.

G. Doctors say the solution is learning how to deal with anger.