问题 单项选择题

某人误食某种物质1小时候后,出现头晕、头痛、恶心、呕吐、多汗、胸闷、视力模糊、无力、肌震颤、瞳孔缩小、呼吸困难、意识模糊、呼出气体有大蒜样恶臭,该人可能是()。

A.有机磷农药中毒

B.有机氯农药中毒

C.亚硝酸盐中毒

D.含砷杀虫剂中毒

E.毒蕈中毒

答案

参考答案:A

解析:有机磷农药中毒的潜伏期一般在2小时内,误食农药者立即发病,轻度可出现头晕、头痛、恶心、呕吐、多汗、胸闷、视力模糊、无力等症状,中度可出现肌震颤、瞳孔缩小、呼吸困难、意识模糊等症状,重度可出现肺水肿、昏迷、脑水肿、呼吸麻痹等。有机磷农药中毒患者的汗液和呼出气味有大蒜样恶臭。

阅读理解

阅读短文,回答问题。

         Jason Queally is one of the fastest men in the world on bicycle. But do you really call the thing in the

picture a bicycle? Well, yes, Jason's human-powered machine, With its two wheels, is, of course, a bicycle.

         Every year, a very important humanpowered bicycle is held in Nevada, USA.  The speed of a bike is

measured (测定) for only 200-metres, but players take more than a kilometre to get their bikes going fast. Jason

Queally's fastest speed for the 200metre race was 103.5 kilometres an hour.

         At this year's race, Jason failed to reach the finishing line. He was speeding along at about 70 kilometres

an hour when he began to lose control of his bike. When he tried to slow down, it began to smoke.Soon the

inside of his bike was filled with smoke.He couldn't see, and he couldn't breathe. At 70 kilometres an hour, a

crash could be very serious. Jason was frightened, but he managed to stop the bike safely. He would rapair his

bicycle and try again another time to be the world's fastest man on a bike. Better luck next time, Jason. 

         Maybe you're surprised that these bikes go so quickly, but is it useful? It could be. Cars are becoming

more and more popular, and they are very safe, comfortable and easy to drive, but they also pollute the air in

our cities. Scientists and engineers are learning from fast racing bikes how to make human-powered vehicles

that might be uesful for daily travel.

1. Is Jason's human-powered machine a bicycle?

                                                                                      

2. How often is the human-powered bicycle race held in Nevada?

   ________________________________________________________________

3. Did Jason stop his bike safely or was he badly hurt?

    ________________________________________________________________

4. Why did he lose this year's race? 

                                                            

5. What is the best vehicle for daily travel like according to the writer?

    ________________________________________________________________

问答题 简答题