题目

What picture do you have of the future? Will life in the future be better, worse or the same as now? What do you hope for about the future? Scientists think that life will probably be very different in 2050.First of all, it seems that people won’t use TV channels(频道) by 2050. Instead, people will choose a program from a “menu”and a computer will send the program directly to the television.Water will become a very serious problem. We’ll need much more water, but there won’t be enough. Some scientists think that water would be the cause of war(战争).Cars will run on new, clean en统计数据表明，在多数太阳活动高峰年，全球农业倾向于增产；在太阳活动低峰年，歉收的几率更高一些。这说明太阳活动会A. 改变地貌形态，影响农作物产量 B. 改变气候状况，影响农作物产量C. 改变水文状况，影响农作物产量 D. 改变土壤性状，影响农作物产量