平时呢，同学们也不要一味地拼命练题之类的，同一时期做多了脑袋会“糊”的，空余时间读读机经原文，也是个不错的选择！今天，易世成都出国英语的小编就给大家整理了2篇好文章，你品读一下，看合不合你味呢！
玛雅文明
某种果树在玛雅废墟那块,长得很好,这个是玛雅文明的证明,但是有人反对,说是因为蝙蝠吃了果子排出种子才造成了这片果树林,和玛雅没有关系...但是后面又有证明说这片果林的产量是其他地方的果林的产量的2倍,说明还是玛雅文明的影响."
原文应该是Charles M. Peters 1983年的一篇文章叫observations on maya subsistence and the ecology of a tropical tree,有条件的G友可以上网找。。。以下是一点总结：
这植物叫B. alicastrum，又叫maya nut.
Miksicek et al.,说B. alicastrum长得很好,这个是玛雅文明的证明,。
文章很长，ets估计节选了后面的：作者谈到frugivorous bats eat the fruit and later drop the seed intact...bat-dispersed seed...总而言之，maya ruins旁边有很多B. alicastrum is a result of normal ecological process does not in itself negate the possibility that the tree was used by the Maya. 因为B. alicastrum很有nutrition，是maya人的staple food.
图源网络，侵删
蜜蜂升温
Ingestion of food containing spores（孢子） of the pathogen Ascosphaera apis causes a fatal fungal disease known as chalk brood in honeybee larvae. However, larvae must be chilled to about 30°C(normal brood-comb temperature is 33-36°C)for the disease to develop. Accordingly（因此）, chalk brood is most common in spring and in small colonies. A recent study revealed that honeybees responsible for hive-temperature maintenance purposely raised the hives’ temperature when colonies were inoculated with A.apis. this “fever,” or up-regulation of temperature, occurred before any larvae died, suggesting that the response is preventative and that either honeybee workers detect the infection before symptoms are visible or larvae communicate the ingestion of the pathogen.
Temperature returned to normal by the end of the study, suggesting that increased temperature is not optimal when broods are not infected, as well as that the fever does not result merely from normal colony growth (i.e., an increase in the number of workers available for temperature maintenance).
文章说了一种病原体,简称A病原体.蜜蜂幼虫吃了含有A的食物之后,体内会长一种致命的菌简称CB.但是CB要在低于幼虫正常体温的情况下才会发作,所以CB主要是在春天侵害小规模的蜜蜂群. 最近一个研究发现.在蜂群感染了A之后,那些负责维持蜂房温度的蜜蜂会有意识地提高蜂房温度. 而这个"发烧现象",可能说明蜜蜂的这一反应(提高温度)是一个保护性措施。 实验结束的时候,(蜂房的温度)又恢复正常了,说明升高的温度并不是蜂群的最佳温度,也说明这个"发烧现象"不仅仅是蜂群数量增大的结果。
易世成都出国英语温馨提醒“烤鸭”们：平时学习的时候一定要注意劳逸结合，不要一味地“蛮干”，这样又花时间又达不到理想的效果。最后，祝愿每个学子都能考出自己理想的成绩，一次通过雅思考试！
