红细胞血型系统主要有ABO和Rh血型系统。在ABO血型系统中，在红细胞膜上只含有A凝集原的为A型，只含B凝集原的为B型，若含有A、B两种凝集原则为AB型；O型者，血清含有抗A、抗B凝集素。

某人的血清中只含有抗A凝集素，则其红细胞的细胞膜上一定

A:含A凝集原 B:含B凝集原 C:不含A凝集原 D:不含B凝集原 E:不含A凝集原与B凝集原

红细胞血型系统主要有ABO和Rh血型系统。在ABO血型系统中，在红细胞膜上只含有A凝集原的为A型，只含有B凝集原的为B型，若含有A、B两种凝集原则为AB型；O型者，血清含有抗A、抗B凝集素。

某人的血清中只含有抗A凝集素，则其红细胞的细胞膜上一定

A:含A凝集原 B:含B凝集原 C:不含A凝集原 D:不含B凝集原 E:不含A凝集原与B凝集原

Car Thieves Could Be Stopped Remotely

Speeding off¹ in a stolen car, the thief thinks he has got a great catch². But he is in a nasty surprise³. The car is fitted with a remote immobilizer, and a radio signal from a control center miles away will ensure that once the thief switches the engine   1  , he will not be able to start it again.

For now, such devices    2   only available for fleets of trucks⁴ and specialist vehicles used on construction sites. But remote immobilization technology could soon start to trickle down to ordinary cars⁵, and    3   be available to ordinary cars in the UK    4    two months.

The idea goes like this. A control box fitted to the car incorporates⁶    5    miniature cellphone, a microprocessor and memory, and a GPS⁷ satellite positioning receiver.    6   the car is stolen, a coded cellphone signal will tell the unit to block the vehicle’s engine management system and prevent the engine    7    restarted.

There are even plans for immobilizers    8   shut down vehicles on the moves⁸, though there are fears over the safety implications of such a system.

In the UK, an array of⁹ technical fixes¹⁰ is already making    9   harder for car thieves. “The pattern of vehicles crime has changed.” says Martyn Randall of Thatcham, a security research organization based in Berkshire¹¹ that is funded in part    10   the motor insurance industry.

He says it would only take him a few minutes to    11   a novice how to steal a car, using a bare minimum of tools¹². But only if the car is more than 10 years old.

Modern cars are a far tougher proposition¹³, as their engine management computer will not

  12   them to start unless they receive a unique ID code beamed out¹⁴ by the ignition key. In the UK, technologies like this    13   achieve a 31 per cent drop in vehicle-related crime¹⁵ since 1997.

But determined criminals are still managing to find other ways to steal cars. Often by getting hold of the owner’s keys in a burglary. In 2000, 12 per cent of vehicles stolen in the UK were taken by using the owner’s keys, which doubles the previous year’s figure.

Remote-controlled immobilization system would   14   a major new obstacle in the criminal’s way by making such thefts pointless. A group that includes Thatcham, the police, insurance companies and security technology firms have developed standards for a system that could go on the market sooner than the   15   expects.

词汇：    

immobilizer n．使车辆不能调动的装置
cellphone n．移动电话，手机
ignition / ɪɡˈnɪʃən / n．点火
trickle / "trɪkl / v．慢慢移动
immobilization / ɪˌməʊbəlaɪ"zeɪʃn / n．使车辆不能调动
burglary / "bɜ:ɡlərɪ / n．夜窃行为；盗窃

注释：

1. speed off：超速驾驶

2. catch：捕获物，猎获物

3. nasty：very unpleasant or annoying使人不愉快的；烦人的

4. fleets of trucks：卡车队。 Fleet：a group of vessels or vehicles owned or operated as a unit车队

5. trickle down to ordinary cars：慢慢地用到普通汽车上。 trickle：to move or proceed slowly or bit by bit慢慢地或一点一点地移动或前进

6. incorporate：to cause to merge or combine together into a united whole混合，合并到某一整体中

7. GPS：Global Positioning System全球定位系统

8. vehicles on the move：在行驶中的车辆

9. an array of：一群；一批

10. technical fixes：技术装置

11. Berkshire：a county of south-central England贝克郡，位于英格兰中南部

12. a bare minimum of tools：极少的工具。 bare：just sufficient；mere刚刚充足的；仅仅

13. Modern cars are a far tougher proposition：现代车远没有这么简单（偷盗现代车要困难得多 )。Proposition：a matter to be dealt with；a task任务，要处理的事务。

14. beam out：to emit or transmit发送，传送

15. drop in vehicle-related crime：涉及车辆犯罪案的下降。 drop：decrease下降

空14

A:speak B:have C:link D:put

Traffic in Our Cities

     The volume of traffic in many cities in the world today continues to expand. This causes many problems, including serious air pollution, lengthy delays, and the greater risk (1) ______ accidents. Clearly, something must be done, but it is often difficult to persuade people to (2) ______ their habits and leave their cars at home.

     One possible (3) ______ is to make it more expensive for people to use their cars by (4)______ charges for parking and (5) ______ tougher fines for anyone who (6) ______ the law. In addition, drivers could be required to pay for using particular routes at different times of the day. This system, (7) ______ as “road pricing”, is already being introduced in a (8) ______ of cities, using a special electronic card ______ (59) to the windscreen of the car.

    Another way of (10) ______ with the problem is to provide cheap parking on the (11)______ of the city, and strictly control the number of vehicles allowed into the centre1. Drivers and their passengers then use a special bus (12) ______ for the final stage of their journey.

Of course, the most important (13) ______ is to provide good public transport. However, to get people to (14) ______ the comfort of their cars, public transport must be felt to be2 reliable, convenient and comfortable, with fares (15) ______ at an acceptable level.

词汇：

lengthy /"leŋθi:/ a．漫长的，冗长的

persuade /pə"sweid/v．说服，劝服

approach /ə"prəutʃ/ n．方法，途径

windscreen /"windskri:n /n．汽车挡风玻璃

outskirt /"aut,skə:t/ n．郊区，市郊

reliable /ri"laiəbl/ a．可靠的，可信赖的

注释：

1.    ... strictly control the number of vehicles allowed into the centre: ……严格控制进人城市中心的车辆数量

2.    …public transport must be felt to be…：……公共交通必须要让人感觉到……

空14

A:pass on B:throw away C:give up D:leave out

多利羊来自几只羊？（）

A:1只 B:2只 C:3只 D:4只

在一个大笼子里关了一些鸡和一些兔子。数它们的头，一共有36个；数它们的腿一共有100条。问鸡和兔各多少只（）

A:鸡21只，兔13只 B:鸡23，兔16只 C:鸡22，兔14只 D:鸡23，兔15只

有人养了一些兔子。别人问他有多少只雌兔，多少只雄兔。他答：在他所养的兔子中，每只雄兔的雌性同伴比它的雄性同伴少1只；而每只雌兔的雄性同伴比它的雌性同伴的两倍少2只。
根据上述回答，可以判断它养了多少只雌兔多少只雄兔

A:8只雄兔，6只雌兔。 B:10只雄兔，8只雌兔。 C:12只雄兔，10只雌兔。 D:14只雄兔，8只雌兔。 E:14只雄兔，12只雌兔。