沃邦题库：热身2019年5月18日雅思判断题

建议做完后，请认真思考毕竟谜底是什么，也可以添加「沃小邦」微信wbonebest99领取笔者已确认过（几经思考，仅供参考）的谜底喔！寄语考题雕刻送君前，不再迷茫苦海边。考点热身战场见，春风惬意暖心间。Because both sexes of white-tailed respond to buck rubs by smelling and licking them, rubs may serve a very important additional function. Fresher buck rubs (less than two days old), in particular, are visited more frequently by adult females than older rubs. In view of this behavior it has been suggested that chemicals present in fresh buck rubs may help physiologically induce and synchronize fertility in females that visit these rubs. This would be an obvious advantage to wide-ranging deer, especially to a socially dominant buck when courting several adult females during the autumn rut.【1】Older buck rubs are visited as often as fresher ones.【2】Fertility in female deer may be affected by chemicals in buck rubs.Even before the drought, the Sahara was never well watered. Both humans and animals were constantly on the move, in search of food and reliable water supplies. Under these circumstances, archaeologist Andrew Smith believes, the small herds of Bosprimigenius in the desert became smaller, more closely knit breeding units as the drought took hold. The beasts were more disciplined, so that it was easier for hunters to predict their habits, and capture animals at will. At the same time, both cattle and humans were more confined in their movements, staying much closer to permanent water supplies for long periods of time. As a result, cattle and humans came into close association.【3】Because of drought, animals tended to become smaller in body size.【4】Animals were not hard for hunters to capture.【5】Both humans and animals moved constantly, so that they did not stay long near permanent water supplies.本文系上海沃邦朱老师原创，如需转载请至"大众,"号后台与我们取得联系，并获取转载授权。存眷“沃邦教导”官方网站（沃邦国际教导-新SAT培训,托福一对一,SSAT培训,ACT测验,AP课程），获取更多SAT、托福等测验信息以及留学资讯。