单项选择题
1、 既是两大洋又是两大洲分界线的海峡是（　　）
A．马六甲海峡
B．白令海峡
C．直布罗陀海峡
D．土耳其海峡


2、 The company had about 20 notebook computers, but only one third_________ used regularly．
A．is
B．are
C．was
D．were


3、通读下面的短文，回答题。
      E-mail or electronic mail, is considered as the modern communication in the new age． It is carried out in computers all over the world by millions of users． In this invisible world as many people call it, the users can send and receive letters to and from every corner of the earth． They share thoughts with pen pals(笔友)in New Zealand, ask strangers in Bombay(孟买) questions, debate with businessman in Manhattan． All of these are just happening in computers as fast as the travelling of the light, no writing and speaking, no paper and stamps are necessary．
      E-mail is a pipeline to thousands of experts on everything; it is a means of meeting people with similar interests or problems． But it is not a live talk--a real conversation like those in telephones． E-mailers compose letters at leisure on their computers, then send them by phone line to an on-line service, and then they go forward to the right place． A response can be back within hours, depending on how often the recipient(接受者) checks in．
     A vast global networks of on-line services for E-mail has been built． A lot of people are regularly using this service in the USA． People believe that E-mail, the computerized exchange, would create friendship and business developments, and would change people's life in the world．
Which of the following expression is not for E-mail?
A．Communication in new age．
B．Invisible world．
C．A live talk．
D．Computerized exchange．


4、根据下面内容，回答题：
人类作为一个物种，所有个体都具有共性；同时，每一个个体之间也有不同的个性。共性与个性之间的冲突就是基因组的全部意义。基因组不仅形成了我们与其他人之间的共性，也形成了我们自己体会过的个性。有些人在感情上比较迟钝，有些人却一碰就跳；有些人在压力面前很焦虑，有些人却寻找风险；有些人很自信，有些人很怕羞；有些人很安静，有些人喋喋不休。我们称这些差异为“个性”。这个词的意思并不仅仅指外在的性格，也指内在的、个体化的性格特点。
在第11号染色体的短臂上有一个名叫D4DR的基因，它是一个名叫多巴胺受体的配方。多巴胺受体的任务是在某些神经细胞与其他神经细胞相连的地方伸到细胞膜外，准备着接纳一个小小的化学物质：多巴胺。多巴胺是一种神经递质，在得到一个电子信号之后被从其他神经细胞的顶端释放出来。当多巴胺受体与多巴胺接触的时候，多巴胺受体就会使它所在的神经细胞发出一个电子信号。这就是大脑工作的方法：电子信号导致化学信号，再导致电子信号。多巴胺是大脑里主管“动机”的化学物质。多巴胺太少，一个人就会失去做事的动机与主动性；多巴胺太多，一个人又会很快厌倦目前的事，而频繁地寻找新的冒险。
多巴胺的一个“表亲”5-羟(读qiăng)色胺，是存在于大脑里的另一种单胺，它是个性的化学表现。如果你的5-羟色胺水平异乎寻常地高，你可能会是一个有强迫症的人，有洁癖，异常小心，甚至会到了神经质的地步。大脑里5-羟色胺水平异乎寻常地低的人，他们易有冲动行为。5-羟色胺浓度的增加可以减轻人的焦虑感和抑郁感，能够把很普通的人变成乐观者。低5-羟色胺水平可以很准确地预测猴子的攻击性，正如它能准确预测人类的冲动行为、自杀、斗殴和纵火行为。这是否意味着，如果法律要求每个男性都时刻把自己的5-羟色胺水平写在脑门上，我们就能够得知应该躲开谁、应该把谁关起来、应该保护谁使得他不会伤害他自己?如果你用人工方法来逆转猴群里的尊卑次序，使得领头的猴子处于从属地位，不仅它的5一羟色胺水平会降低，它的行为也会变化。更有甚者，人类当中也有类似的现象，告诉人们说他们有低或高的5-羟色胺水平可以成为一种可应验的预言。整个5-羟色胺系统是与生物决定论有关的，但是这并不是像人们通常假设的那样，意味着你的行为不会被社会环境改变。正相反：你大脑里的化学变化是由你接收到的由社会环境传来的信号所决定的。生物结构决定行为，社会又决定生物结构。社会对行为的影响是通过启动或关闭基因而完成的。

下面对段文意的理解，不正确的一项是（　　）
A．因为人类是一个特殊物种，所以在性格上表现出共性与个性的冲突
B．共性与个性的并存是由基因组决定的，是生物个体普遍存在的现象
C．不同人在性格行为上存在巨大差异，这些差异构成了每个人的个性
D．所谓个性，既指外在行为模式的不同，也指内在基因层面上的差异


5、 5个人排成一排，甲、乙相邻的不同排法有(  )
A．60种
B．48种
C．36种
D．24种


6、过点A(-2，3)作直线l，使之与直线x+y+1=0垂直，则直线1的方程为
A．x+y-1=0
B．x-y-5=0
C．x+y+5=0
D．x-y+5=0


7、 阅读下列短文，回答题。
Much of the best food in the world is free. These are some of the foods which you can pick for free in Europe.
Every autumn,people all over Europe go out into the woods and fields to look for mushrooms( 蘑菇). People in France, Germany,Poland and Italy are very interested in mushroom picking. You have to be very careful when you pick wild mushrooms. Some are delicious, but others that look very like them can give you a stomachache. Some kinds of mushroom are dangerous and can make you ill or even kill you.
The most famous and delicious kind of mushroom is the truffle(块菌). It grows underground in forests, especially in Italy and France. It is very difficult to find. Farmers usually go out with dogs or pigs. When the animals get excited and start to dig, they know that there are truffles underground.
They dig them up very carefully. Truffles are very valuable. They can be black or light brown or white.
In the countryside, there are lots of different fruits to pick. In June you may find wild strawberries. The best time to look for them is in the evening. If you walk around in woods, sometimes you will smell them before you see them. The blackberry(黑莓) is also well liked. It grows wild round the edges of fields in September and early October.
Blackberries are black and small and very sweet. You can eat them as they are with sugar and cream. Or you can cook them for four minutes with some sugar and a little lemon juice. You can also make a very good jam with them.
What is the passage mainly about?
A．Wild mushrooms.
B．Truffles and fruits.
C．Best food in the world.
D．Food you can pick for free.


8、 It was not __________ she took off her dark glasses I realized she was a famous film star.
A．when; that
B．until; that
C．until; when
D．when; when


填空题
9、



10、 一种无色溶液可能含有KNO₃、NH₄Cl、Na₂SO₄、(NH₄)₂SO₄、Na₂CO₃、(NH₄)₂CO₃中的一种或几种，用其做如下实验，现象是：
(1)取少许溶液进行焰色反应，透过蓝色钴玻璃观察，火焰呈浅紫色．
(2)往溶液中加入少量NaOH溶液并加热，产生有刺激性气味的气体．
(3)往溶液中加入少量BaCl₂溶液，有白色沉淀生成．继续加入过量稀HNO₃，白色沉淀部分溶解．
试判断溶液中一定含有的物质是__________________；白色沉淀溶于稀HNO₃的离子方程式是____________________________________．

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