如果给小白鼠注射过量的胰岛素，一般情况下短时间内出现的症状及

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问题填空题

如果给小白鼠注射过量的胰岛素，一般情况下短时间内出现的症状及原因的说法正确的是（　　）

A．休克无力行走

B．死亡血糖浓度过低

C．昏迷血糖浓度过高

D．精力旺盛血糖浓度不断提高

答案

胰岛素是由胰岛分泌的，它的主要作用是调节糖的代谢，具体说，它能促进血糖合成糖元，加速血糖分解，从而降低血糖浓度；给小白鼠注射过量的胰岛素，会使小白鼠体内的血糖浓度降到最低，而糖类是动物体主要的供能物质，动物体的一切活动所消耗的能量主要来自糖类，当小白鼠体内的血糖浓度过低时，由于没有足够的能量供应，小白鼠的各项生命活动就会停止．

故选：B

完形填空

Some people say they have an answer to the problems of car crowding and pollution. In many cities, hundreds of people ride bikes to work every day. In New York City, some bike riders have even       a group: Bike for a Better City. They say if       people rode bikes to work, there would be fewer cars and less dirty air.
For several years this group has tried to help bike riders. They want to have special roads for bikes only because when bike riders must use the same roads       cars, there may be accidents. Some people for a better city feel if there were bike roads, more people would use bikes.
But     bike roads have been ready yet. Not everyone thinks it is a good      .Drivers don't like it, and some shop owners don't     . And most people living       _ far from the city to have to travel by bike. Still,       has been done about it. On Saturdays and Sundays, the largest open park in New York is          to cars, and the roads may be used by bikes only, but the group still says this is not enough and goes on fighting        bike roads.

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单项选择题

31～35题基于以下题干：
J，K，L，M，N，O，P和R 8个人将被分成X和Y两队参加接力赛，每队4个人。该接力赛要连续跑4圈。两队的比赛同时进行，每个队的成员恰好跑一圈，且满足以下条件：
(1)J和K在同一队；
(2)K和N不在同一队；
(3)不管R和P是否在同一队，R都在户的前面跑；
(4)M和N都在Y这一队；
(5)J和M都不跑第3圈；
(6)K和L都跑第2圈；
(7)O跑第4圈。

若O和R被分配到同一队中，则下面哪一项一定正确

A．M跑第4圈。

B．P跑第4圈。

C．N跑第4圈。

D．P跑第1圈。

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