题干

已知点A(﹣1,0),点B(1,0),直线AM,BM相交于点M,且直线AM的斜率与直线BM的斜率的商是3,则点M轨迹是____.
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答案(点此获取答案解析)

直线x=﹣2(除去点(﹣2,0))

同类题3

阅读下面的文字,完成小题。

亚父之死

房占民

月上弦,围几粒星子,明明灭灭。

项王大帐里,酒香流溢。亚父范增与项王对饮。亚父分析着当前的战情,项王不置可否,脸沉似水,亚父心里有疑,便不再多言。

蚊虫舞,不时有巡营的兵士从帐前走过。

大王,您有心事?

项王无语,脸色愈加阴沉。

您累了,咱们改日再议吧。亚父起身作揖。

等——等——项王把手一挥,战袍一甩,身子兀自不动。烛火在风里摇摇晃晃。

你,年事已高,我看——项王的话没有说下去,可亚父明白,项王是想把自己赶走。瞬间,亚父感觉苍老了许多。他踉踉跄跄地离了大帐。夜深了,灯火里,一片静寂。

亚父,谋于人臣,多次献奇策,楚军因之战无不胜。项王愈喜之、愈忧之。

真正让他下定决心赶走亚父的是吕马童。

吕马童,项王的乡人,幼年的玩伴,战场上曾替项王挡过一箭,项王视之为亲信。

彭城一战后,项王带兵围汉于荥阳,项王派吕马童入汉,陈平用反间计。

吕马童回项王:亚父已生二心,不可用。

亚父走了,走时,他眼望项王那如山的背影,心如刀割,老泪纵横。

月挂中天,如盘,兵急走。

垓下,项王心力交瘁。鼾声时而疾如奔矢,时而缓如清溪。不知觉中来到一处所在,高崖危耸,松涛震耳,有阴森的凄号声从渊里传来。那云雾缭绕之处,一独舟无所凭依般从渊里渡来,渐近渐明,那摆渡人,神似了亚父范增,正琢磨该如何对话之际,崖壁忽然向斜刺里倒去。项王一惊,口喊,亚父救我——睁眼一看,帐中灯火还明。虞姬卧在身边,温柔地望着他,轻轻地说:大王,亚父已经死了。

项王知道,亚父在去往彭城的路上,已经死了。项王眼里有泪,未滴下,心里痛。

月下弦,围几粒星子,明明灭灭。

项王兵少食尽。汉军及各路诸侯将项王围得水泄不通。楚歌声起。闻者垂泣,项王看了一眼自己心爱的虞姬,悲饮酒,歌数阕。虞姬散乱的发在血液里铺开,裙裾掩去了她梅雪般的芬芳。项王泪如雨注。最后破喉之泣定格了项王这一生爱的记忆。

项王上马,八百人突围,疾走至乌江畔,只余二十骑。此时,从江心渡过一船,定睛一看,是项王的故人乌江亭长。远远地便招呼项王上船渡江。项王仰望微明的天空上的那一淡白月痕,又看了一眼远处追来的汉军,慨然长叹:我少年离乡,有八千兵士相随,而今,二十人,二十人啊!我,我还有何面目去见江东父老!说罢,早已盈眶的泪再也止不住,风中传来了乌骓马的嘶鸣。

项王双膝一软,跪在了江岸。

老伯,项羽无能,向江东父老谢罪了。说着,项王的头如鸡啄,片刻,额上血肉模糊。

兵士们望着浩渺的江面,皆泣不成声。

项王大喝,快渡江,善待乌骓!声音在江面上飘荡。

小舟越行越远,渐消失在了清晨的江雾里。

项王对敌汉军,疲力挣扎,可手中剑依然若梨花雪舞,在空中上下翻飞,近之者死,触之即亡。再加之项王雷霆般的怒吼,一时之间,汉军竟无一人近前,尤恐避之不及。

项王视敌军中有一熟悉面孔。竟是乡人吕马童!

项王一怔,左肩就中了一剑。项王定睛细看,没错,是吕马童。

吕马童,我待你不薄,你何至于此?

吕马童不答,口里只是不停地喊着,杀项羽,封侯王!项王怒从中来,二目灼灼,望着吕马童,大有恨不能撕之而后快之意。他虚做手势招他近前,吕马童不进反退,口里仍喊着:杀项羽,封侯王!

项王再不等待,一跃而起,剑在吕马童面门前一晃,顿时血花四溅,吕马童的半张脸就开了花,吕马童颓然倒地。项王瞧着呻吟的吕马童,把剑往颈上一放,对着天空大喊:亚父,我来了。

忽停,又喊,天亡我也!三声过后,自刎而死。

吕马童得项王一躯体,汉王封他为中水侯。

项王哪里知道,汉王用反间计,厚赂吕马童,为防项王再度起用亚父,吕马童暗暗使人尾随范增,在一僻静之所,暗箭射亚父,谎报称亚父死于恶疾。史云:疽发背而死。

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。

    It's natural for all kids to worry at times, and because of personality differences, some may worry more than others. ____ They typically worry about things like grades, tests, their changing bodies, fitting in with friends, the goal they missed at the soccer game, or whether they'll be bullied (欺负), or left out. Luckily, parents can help kids manage worry and deal with everyday problems.

    To help your kids manage what's worrying them:

    Find out what's on their minds.

    Be available and take an interest in what's happening at school, on the team, and with your kids' friends. ____ As you listen to stories of the day's events, be sure to ask about what your kids think and feel about what happened. Sometimes just sharing the story with you can help lighten their load.

    ____

    Being interested in your child's concerns shows they're important to you, too, and helps kids feel supported and understood. Reassuring (令人安心的) comments can help—but usually only after you've heard your child out. Say that you understand your child's feelings and the problem.

    Guide kids to solutions.

    ____ When your child tells you about a problem, offer to help come up with a solution together. If your son is worried about an upcoming math test, for example, offering to help him study will lessen his concern about it.

    Offer reassurance and comfort.

    Sometimes when kids are worried, what they need most is a parent's concern and comfort. ____ It helps kids to know that, whatever happens, parents will be there with love and support.

A. Show you care and understand.

B. Take casual opportunities to ask how it's going.

C. It might come in the form of a hug or time spent together.

D. Kids sometimes worry about things that have already happened.

E. Not all the kids worry about their teachers when they start a new school.

F. What kids worry about is often related to the age and stage they're in.

G. You can help reduce worries by helping kids learn to deal with challenging situations.