Observing the death of honeybees should warn us that our own wellbeing might be similarly threatened,and the widespread collapse of so many groups presents a clear message:We must demand that our regulatory authorities require studies on how exposure to low dosages of combined chemicals may affect human health before approving compounds.
Bees also provide some clues to how we may build a more collaborative relationship with the services that ecosystems can provide.Bees could offer some of the pollination service needed for agriculture.People discovered that crop harvests,and thus profits,are maximized if some croplands are left uncultivated for bees.Meanwhile a variety of wild plants means a healthier,more diverse bee population,which will then move to the planted fields next door in larger and more active numbers.
【解题导语】 本文是一篇说明文。每年世界各地的蜜蜂大量死亡,这些蜜蜂的死亡给了人们关于建立协作性的生态系统的警示。
www.gkxx.com1.Which of the following is NOT the cause that leads to bees dying?
A.Lack of nutrition from enough diverse flowering plants.
B.The pests and diseases of the bees.
C.The beekeepers’ destroying without intention.
D.The pesticides applied to crops.
解析:选A。细节理解题。根据第二段除第一句以外的句子可知,主要的原因包括应用于田地的杀虫剂,以及直接用于网络的用来控制害虫、疾病的杀虫剂。大面积种植同一作物缺乏多种开花植物所造成的营养不足;而商业养蜂本身,破坏大部分蜜蜂每年多次授粉作物。故选A。
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