学进去

据甲骨卜辞可以推断，在商朝“王臣”是商王的私兵，他们平时活动在商王左右，战时出征。但到了西周晚期，“王臣”囊括了周王国里除周王之外的所有臣民。出现这一变化是因为（     ）

A．西周建立了封建的专制王权	B．“家天下”的局面深入发展
C．分封制不断推行并得以完善	D．商周时期实行土地国有制

已知椭圆的左右焦点分别为，，离心率为，且经过点．

(1)求椭圆的方程；
(2)若经过的直线与椭圆交于A，C，经过的直线与椭圆交于B，D，与交于点P（点P在椭圆内），求证：．

已知函数是定义在实数集上的奇函数，且当时，．
（1）求的解析式；
（2）若在上恒成立，求的取值范围．

已知函数
(1)当函数有3个零点，求实数的取值范围；
(2)当取条件(1)下的取值时，设函数有3个零点，，，证明：

已知函数存在零点，则实数的值为（       ）

A．

B．

C．

D．

阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。

We three were running down the path, shouting and laughing when our dog Rubby suddenly stopped in the distance. He turned around and eyed us, with his tail swinging up and down.

My little brother Toby immediately sped up and rushed to where Rubby was. He bent down. picked up something and ran back to us.

It was a bunch of keys. We gathered in a circle, examining the keys one by one. hoping to find some useful information about its owner. There were 3 keys — a house key, a mail key and a car key and a unique key fob (吊坠) very likely designed specially.

“Gosh, the owner might be in great trouble,” my sister sighed. She was right. We once lost our keys. Although we had an extra house key, it took our parents quite a long time to get a new mail key. let alone there was a car key.

Who might have lost them?

Alter many wild guesses, we finally drew a conclusion. It might belong to someone in our neighborhood as only our neighbors wandered into the woods for a walk. But it was still impossible to figure out who it was. We had a very big neighborhood.

“The owner might come back to look for them,” Toby reminded.

So we decided to stay where we were, keeping a watchful eye on all passers-by. Our little dog ran in circles of excitement since we stayed so long in the wild. We remained in the woods for two hours, asking everyone we came across whether they lost their keys, but in vain.

It seemed we had to give up. But my sister wouldn’t, saying that she just couldn’t stop picturing the owner brushing aside tall grasses hoping to find the lost keys. “How anxious and upset the owner would be!”

I took a look at the bunch of keys again and quite by accident, found the key fob had the alarm button. “Look! If we press the alarm button, close enough of course, we can set off the owner’s car alarm.”

“That’s brilliant.”

注意：
1. 续写词数应为150左右；
2. 请按如下格式在答题卡的相应位置作答。

We rushed back to our neighborhood.

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The door opened and in front of us stood an old lady.

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书面表达
众所周知，地震是一种可怕的自然灾害，近期日本和厄瓜多尔相继发生7级以上大地震，造成了巨大的人员伤亡和财产损失。那么当地震来临我们需要怎样去做呢？

在教室时	藏在课桌下面等待老师指示
在家时	藏在起居室或厨房的桌子下。不要去窗户旁边也不要去阳台（balcony）
在街上时	不要站在建筑物，栅栏（fence）或墙边，也不要站在树下，要赶快到安全的露天的空地去

请根据以上信息写一篇文章，题目已给出。
注意：词数100左右。

What to Do During an Earthquake

As we all know, an earthquake is a kind of terrible disaster. So what should we do when an earthquake comes?

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自宋以后，江南成为中国人口最密集的地区。然而随着时间的推移，江南的人口不断迁往全国各地。他们每迁移到一处，往往能发挥江南人的巧思和才智，从而成为地方社会中的显赫角色。这一人口走向（     ）

A．与经济重心南移同步发展	B．对迁入地的发展颇具影响力
C．推动了城市经济发展繁荣	D．体现出逆城市化的发展趋势

舰载机电磁弹射是现在航母最先进的弹射技术，我国在这一领域已达到世界最先进的水平。某兴趣小组依据所学知识设计出了一种电磁弹射模型，其原理可简化为图乙所示情景：水平面内由平行长直金属导轨组成的水平区域内，等间距分布着竖直向下和竖直向上的磁场，磁感应强度均为B。电磁弹射装置可简化为一个矩形金属框，其长边等于导轨间距L，短边等于每个磁场的宽度。磁场以速度v₀向右匀速运动，固定在金属框上方的舰载机在电磁力和发动机推力的双重作用下加速向右滑行，达到起飞速度时舰载机和金属框自动脱离，飞机升空。舰载机在水平跑道上加速滑行时，受到竖直向上的机翼升力、发动机推力、空气阻力。升力F_升、空气阻力F_阻均与舰载机运动的速度成正比，即F_升=k₁v，F_阻=k₂v，k₁、k₂为已知常量。金属框与导轨接触面间的等效动摩擦因数为μ。已知舰载机质量为M，金属框质量为m，舰载机在轨道上加速滑行时发动机推力为恒力F，金属框电阻为R，其余电阻均不计。
（1）判断金属框在图乙位置时的感应电流方向（填“顺时针”或“逆时针”）；
（2）当舰载机达到升空速度时，金属框内感应电流多大？
（3）舰载机在水平轨道上匀加速滑行时磁感应强度B需满足什么条件？
（4）写出舰载机在水平轨道上匀加速滑行时发动机推力的功率随时间变化的关系式。

关于《满江红·怒发冲冠》词作者是不是岳飞，史学界长期存在争议。上世纪30年代，著名学者余嘉锡首次提出《满江红》的作者不是岳飞，主要理由有二：一是该词首见于岳飞死后300多年后的明代中期，岳飞儿孙编写的岳飞诗文集《金佗粹编》未收入该词；二是词中“踏破贺兰山缺”的贺兰山位于甘肃、宁夏境内，当时属于西夏，远离宋金交锋主战场。1983年在浙江江山发现了《须江郎峰祝氏族谱》，该族谱记载了岳飞在1133年赠送给祝允哲的《满江红·与祝允哲述怀》词作：“怒发冲冠，想当日、身亲行列。实能是、南征北战，军声激烈。百里山河归掌握，一统士卒捣巢穴。莫等闲、白了少年头，励臣节。靖康耻，犹未雪；臣子恨，何时灭？驾长车，踏破金城门阙。本欲饥餐胡虏肉，常怀渴饮匈奴血。借君行、依旧奠家邦，解郁结。”这一发现，让历史的真相（     ）

A．变得清晰，明代版《满江红》不是岳飞所作，因与江山族谱版差异很大

B．变得清晰，明代版《满江红》应为岳飞所作，在流传过程中产生过变异

C．更加迷离，学者须对《须江郎峰祝氏族谱》的版本、年代多加考量

D．更加迷离，证实了余嘉锡对明代版《满江红》作者的考证是正确的