已知函数f（x）=+kx+b，其中k，b为实数且k≠0．

（I）当k＞0时，根据定义证明f（x）在（﹣∞，﹣2）单调递增；

（Ⅱ）求集合M_k={b|函数f（x）有三个不同的零点}．

　

　

2016年1月20—23日，我国南方多地迎来了大范围雨雪冰冻天气，下图是该时段雨雪分界线推进示意图。据此回答下列各题。

【1】图中丙地的天气系统是(　　)
A. 暖锋 B. 冷锋
C. 高压 D. 低压
【2】该时段，图中四地雨雪分界线平均推进速度最快的是(　　)
A. 甲 B. 乙
C. 丙 D. 丁
【3】果农在1月19日前，采用塑料薄膜覆盖法或熏烟方法来保护果园，其中的地理原理叙述正确的是(　　)
A. 大气削弱作用减弱
B. 大气逆辐射增强
C. 地面辐射增强
D. 太阳辐射增强

2020年全球爆发了新冠肺炎疫情。新冠肺炎由新型冠状病毒感染所致，如图表示新型冠状病毒的结构模式图，该病毒的遗传物质为单链RNA，其通过刺突糖蛋白（S）与宿主细胞表面受体血管紧张素转化酶II（ACE2）专一性结合进入宿主细胞，在宿主细胞内完成增殖。下列相关叙述错误的是（ ）

A.新型冠状病毒的组成有RNA和蛋白质，但其不属于生命系统的结构层次
B.该病毒容易发生变异是因为RNA中A与U碱基配对时形成的氢键太少
C.具有ACE2受体的细胞可将该病毒作为自己需要的成分吞入细胞内部
D.抑制该病毒表面的刺突糖蛋白或细胞ACE2受体活性可能会阻止该病毒的入侵

在《研究小车的加速度与小车所受外力的关系》的实验中，仪器如图连接：连接中不正确的地方有

①　                         

②　                            

③                                 ．

读某区域简图，回答下列问题。（10分）

⑴A、B两处海水盐度较高的是            ，原因是            。（2分）

⑵我国从P国进口优质铁矿过程中，主要利用了海洋        资源。（2分）

⑶Q处某岛国即将被海水淹没，这里的海域将属于        ，海底将成为        ，均为全人类共享财产。（2分）

⑷简要分析D沿海地区没有形成大盐场的自然原因。（4分）

Before Hurricane Sandy hit the east coast of the United States, it had killed 54 people in Haiti and left tens of thousands more homeless. Haiti is especially tender because of its underdevelopment, so people die there—as they did during the earthquake in January 2010—in greater numbers than they would in other countries subject to the same natural disasters.

But there is one disaster that was brought to Haiti directly by people, now by nature. It was not caused by extreme weather. That disaster is the cholera that struck Haiti two years ago.

Most people I talk to don’t even know that United Nations troops brought this deadly disease to Haiti in October of 2010. There hadn’t been any cholera in Haiti for at least 100 years, if ever, until some UN troops from /south Asia poured human waste into a branch of the country’s main water supply. Since then, more than 7,600 Haitians have died and over 600,000 have gotten sick.

However, the UN is still denying its responsibility, despite studies published by the New England Journal of Medicine, tracking the origin of Haiti’s cholera bacteria to UN soldiers. A study by a team of 15 scientists last year produced even more conclusive evidence, using whole genome sequence typing (基因系列归类) and two other methods that matched the cholera strain in Haiti to a sample from Nepal that was taken at the time when the Nepalese UN troops arrived in the country. In short, there is proof beyond reasonable doubt that the UN mission is responsible fro bringing this disease to Haiti.

So there is one obvious source of money fro ridding the country of cholera, but so far, only about 53% of the $5.35 billion promised by international donors has been delivered. For the US government, it is just 27%, or $ 250 millions. If these governments want to help the UN fix the mess that they created, they should have already committed the funds to do so.

57.       By mentioning the hurricane and earthquake happening in Haiti in Paragraph 1, the author implies________.

A. natural disasters are unmerciful

B. many deaths could have been avoided

C. Haitians are easy to become victims in face of disasters

D. America should be responsible for them

58.       How does the author show the origin of Haiti’s cholera bacteria?

A. By providing supporting evidences.                      B. By analyzing the results.

C. By making further investigations.                           D. By challenging the UN.

59.       How much money should the American government have offered to Haiti?

A. 2.84 billion dollars.      B. 925 million dollars.        C. 67.5 million dollars.        D. 250 million dollars.

60.       What does the author write the passage most probably for?

A. To introduce the serious cholera situation in Haiti.

B. To ask for more financial help from UN.

C. To prove the direct cause of Haiti’s cholera outbreak.

D. To condemn the attitude of international community towards Haiti’s cholera.

如图所示甲、乙两种表面粗糙的传送带．倾斜于水平地面放置．以同样恒定速率v向上运动．现将一质量为m的小物体（视为质点）轻轻放在A处，小物体在甲传送带上到达B处时恰好达到传送带的速率v；在乙传送带上到达离B竖直高度为h的C处时达到传送带的速率v．已知B处离地面高度为H，则在物体从A到B的运动过程中（　　）

 

   A．两种传送带对小物体做功相等  

    B．将小物体传送到B处，两种传送带消耗的电能相等

    C．两种传送带与小物体之间的动摩擦因数不同

    D．将小物体传送到B处，两种系统产生的热量相等

下列各句中没有语病的一句是

A．英国伦敦高等法院日前裁决，《达·芬奇密码》的作者丹?布郎被控抄袭另一畅销书著作权的罪名不成立。

B．日前，网易、新浪等14家网站联合向全国互联网界发出文明办网倡议书，号召营造健康文明的网络文化环境，清除不健康信息，已成为社会的共同呼唤、家长的强烈要求和保障未成年人的迫切需要。

C．一份由中国火箭技术研究院院长吴燕生和中国火箭运载研究院总设计师刘竹生领导的科研小组提供的研究报告表示，我国目前的火箭运载能力，已经能保证完成绕月工程所需要的飞行器发射任务。

D．韩寒和白烨的这次网络论战已告落幕。网民认为，从中国现行的学术框架来看，白烨最大的理亏在于他的学术属于公职研究，不应利用公职身份进行个人商务活动，但他却违规介入市场进行商务活动。

基因型为AaBb的精原细胞产生的精子基因型为AB则其形成过程中产生的两个次级精母细胞的基因型为()

A  AB、ab    B  AABB   AABB    C  aabb;   AABB      D  AaBb; AaBb

下列说法正确的是（　　）

A．乙烯和甲烷都能发生加聚反应

B．甲烷和乙烯都可以与氯气反应

C．酸性高锰酸钾溶液可以氧化苯和甲烷

D．乙烯可以与氢气发生加成反应，苯不能与氢气加成

Half a year ago I came across a book called”Salt,Sugar and Fat. How the Food Giants Hooked US”,but finished it only recently. I am far from being a fan of junk food,over-salty,or over-sweet stuff,and honestly this food doesn’t appeal to me at all. Maybe it is related to the fact that I grew up in Russia and at that time we were not so exposed to the foreign, especially made in America foods. We knew Coca Cola,Pepsi,juice powder and Cheetos,but this stuff was not so cheap or available to buy it every day and we couldn’t buy them in large quantities. We didn’t know the word”fat”was not a bad thing but a normal of life for some people. We always had sweets and especially on holidays they were served as a dessert along with a cake. Russians like eating sweets when they drink tea. Even with my passion to desserts I still can’trelate myself to the people Michale Moss was writing about, those consumers who could not say”no” when it came to junk food.

What I found interesting in the book was that the author didn’t focus on diets, necessity to

exercise,sleep well at night and all other things we all are pretty aware of. The aim was not to teach people how to live but instead,after having made a huge research,interviewed more than 100 people in the food industry,Moss reveals the ugly of the food business. It puts all the facts in front of us and offers a choice:to buy or not to buy. However,the answer was known at the very beginning. Moss mentions the well-known food like Coca,Cola,Pepsi,Nestle and some others and tells how skillfully the consumers can be cheated when it comes to choosing what to put in the food basket in the supermarket. We like this taste of a chocolate,the crispy chips,and sweet porridges because it was all put on test by groups of scientists who made experiments to reveal what kind of taste will be most appealing to us. It involves brain,of course. Apart from scientific researches, it was also due to successful marketing strategies and plans that people prefer to buy food.

In this companies’money race,the most vulnerable(易受伤害的)victims are kids. They can’t tell good from bad and love everything that makes them feel good. Commercial ads of fast food particularly targeted kids and played on the fact that mothers can’t fully control what their children eat because they spent all day at work. Mothers themselves buy chocolates bars and com flakes for their kids,guided by a powerful brainwashing that actually,these products were not unhealthy, on the contrary, it was encouraged to give them to kids, because fat and sugar provide energy, so they are good,right?

   Giving a credit to some food companies, they made attempts to fight the trend, but consumers,who already worked a habit of eating too salty, too fatting and too sweet products,didn’t react to the changes. So the companies returned to the old policy. Surprisingly,such behavior was strongly backed up by the govermment.

I would definitely recommend  reading this book not only to those who struggle in the battle with his addiction to fast food but also people living healthily. It casts light on many things,including how vulnerable we can be in front of corporations and their powerful and accurate marketing strategies.

66. In the book “Salt, Sugar and Fat. How the Food Giants Hooked US”,Moss focused on_____.

   A.how to keep fit.                   B.how junk foods are made

   C.How to buy healthy food            D.how food companies cheated us

67. What does the world”It” in paragraph two refer to?

   A.The book       B.The research       C.The food industry       D.The author

68.What is the author’s attitude towards the government?

  A.objective        B.supportive         C.positive               D.negative

69.As to the book,the author might agree that____________.

  A.it is necessary for those who want to lose weight

  B.people will give up fast food after reading it

  C.it explains many things that we are not well aware of

  D.it teaches people how to live a healthy life

70.The author wrote the passage mainly to______________.

  A.introduce a healthy diet

  B.expose the ugly side of food companies

  C.call on the potential readers to live healthily

  D.recommend the book written by Moss

在复习元素周期律过程中，某研究性学习小组的几位同学拟通过具体的实验来探讨某些金属元素的性质差异，下面是他们设计的探究性实验方案，请填写下列空白：

（1）实验目的：比较钠、镁、铝金属性强弱。

（2）实验用品：酒精灯、       、试管、试管夹、砂纸、滤纸；

钠、镁条、铝片、酚酞、蒸馏水、6 mol·L^－1的盐酸

（3）实验过程与现象记录

Ⅰ．甲同学的方案如下：

实验过程	预期现象	实际观察到的现象
a取已切去表皮的一小块金属钠，放入盛有水的某容器中	立即剧烈反应	开始时钠块浮在水面上不反应，稍后才开始与水剧烈反应
b向盛有适量水（内含2滴 酚酞的试管中加入一小段镁条	有气泡产生，溶液变红色	没有相应现象，加热后仍无明显变化
c向两支盛有3mL6mol·L－1盐酸的试管中加入大小相同的镁片和铝片	镁、铝与盐酸反应产生气泡剧烈程度不同	镁与盐酸反应产生气泡速率较快

①你认为a、b两步实验中出现异常现象的可能原因是：

a                                        ；

b                                            。

②上面的实验表明：钠、镁、铝三种元素的金属性由强到弱的顺序为                     。

Ⅱ乙同学的方案：他认为只需要一种试剂就可以确定钠、镁、铝的金属性强弱，预计他的主要实验操作是                     。

2015年10月5日，由美国主导，日本、澳大利亚、新加坡和加拿大等12个国家参与的“跨太平洋战略经济伙伴协定”（TPP）谈判达成一致意见。中国不是TPP的参与国，但人们普遍认为TPP形成的贸易规则会对中国产生广泛影响。这种看法的依据是

A.任何事物都处于普遍联系之中         B.经济全球化是由发达国家主导的

C.人在联系面前是无能为力的          D.经济全球化是一把“双刃剑”

已知，平面，若，则四面体的外接球（顶点都在球面上）的表面积为

A．        B．         C．       D．

设函数，则的值为         ．

 2009年l0月，我国自主研发的转基因抗虫水稻“华恢1号”获得农业部颁发的安全证书。下图表示该抗虫水稻主要培育流程，据图回答：

（1）④过程应用的主要生物技术是                       。

（2）杀虫基因(crylA)是人们根据几种Bt毒蛋白的分子结构，设计并人工合成的，这属于         工程技术范畴。

（3）组建理想的载体需要对天然的质粒进行改造。下图是天然土壤农杆菌Ti质粒结构示意图(示部分基因及部分限制性内切酶作用位点)，据图分析：

①人工改造时，要使抗虫基因表达，还应插入                     。

②人工改造时用限制酶II处理，其目的是：第一，去除质粒上的                          (基因)，保证T—DNA进入水稻细胞后不会引起细胞的无限分裂和生长；第二，使质粒带有单一限制酶作用位点，有利于                                。第三，使质粒大小合适，可以提高转化效率等。

③若用限制酶I分别切割改造过的理想质粒和带有抗虫基因的DNA分子，并构成重组Ti质粒。分别以含四环素和卡那霉素的培养基培养已成功导入抗虫基因的水稻胚细胞，观察到的细胞生长的现象是                                                                              。

（4）若限制酶II切割DNA分子后形成的粘性末端为，则该酶识别的核苷酸序列是                            。

某哺乳动物的直毛(A)对卷毛(a)为显性，黑色(B)对白色(b)为显性，这两对基因分别位于不同对的同源染色体上。基因型为AaBb的个体与个体X交配，子代的表现型为：直毛黑色、卷毛黑色、直毛白色、卷毛白色，它们之间的比例为：3：1：3：1。问个体X的基因型为（    ）

A．AaBb        B．aaBb         C．Aabb         D．aabb

某二倍体植株（2N=14）的叶形有宽叶和窄叶两种，分别受一对等位基因D、d控制，宽叶对窄叶为显性。该植株中偶见7号染色体三体的变异植株，这种变异植株能正常繁殖，产生的配子均可育。回答下列问题：
（1）7号染色体三体植株的具体变异类型属于__________________。
（2）该种植物偶见7号染色体三体，从未见其他染色体三体的植株，可能的原因是___________________。
（3）为判断控制叶形的基因是否位于7号染色体上。研究人员进行了如下实验探究：
①将纯合的7号染色体三体宽叶植株与正常窄叶植株杂交得到F1，F1中三体植株占______，挑选F1中三体植株与正常窄叶植株杂交得到F2，统计F2的表现型及比例。
②若_______________________________________，则控制叶形的基因位于7号染色体上；
若_______________________________________，则控制叶形的基因不位于7号染色体上。

某同学用如图甲所示的实验装置来验证“力的平行四边形定则”。弹簧测力计A挂于固定点P，下端用细线挂一重物M，弹簧测力计B的一端用细线系于O点，手持另一端向左拉，使结点O静止在某位置。分别读出弹簧测力计A和B的示数，图乙为A的示数。在贴于竖直木板的白纸上记录O点的位置和拉线的方向。

(1)本实验用的弹簧测力计示数的单位为N，弹簧测力计A的拉力为________ N。

(2)下列的实验要求中不必要的是________。

A．细线应尽可能长一些

B．应测量重物M所受的重力

C．细线AO与BO之间的夹角应尽可能大于90°

D．改变拉力的大小与方向，进行多次实验，每次都要使O点静止在同一位置

(3)图丙是在白纸上根据实验结果画出的力的图示，下列说法正确的是___。

A．图中的F是力F₁和F₂合力的理论值

B．图中的F′是力F₁和F₂合力的理论值

C．F是力F₁和F₂合力的实际测量值

D．本实验将细绳都换成橡皮条，同样能达到实验目的

14．