题目

After having more than a few acquaintances online, it might come a blow to keen social networkers like Barack Obama, or even Facebook founder Mark Zuckerberg himself.    According to a research, the average person has in fact twice as many online friends as physical ones. Users of social-networking sites have on average 121 online friends as compared with physical ones. The study also claims that people tend to be more open, confident and honest with their virtual friends than their “real” ones.    “For most people , the Internet is a way of keeping in touch with loved ones a读澳大利亚年降水量分布图(左下图)和局部地区农业类型分布图(右下图)，回答下列问题。 （1）简述墨累达令盆地农业发展的主要限制因素及解决措施。 （2）写出种麦养羊业的农业地域类型名称，简述其主要优点。 （3）依据右上图说明该地区乳畜业的分布特点，简析影响乳畜业生产的主要因素。