题目内容
A．The animals over-fertilize the soil.B．Dead plant roots can't hold the soil together.
查看答案
搜索结果不匹配？点我反馈
更多问题
听力原文： Today, I'd like to talk about some of the changes land can undergo, specifically desertification. That's the process through which land becomes part of a desert. Now a desert is defined as a place that receives a certain maximum amount of rainfall. But you may not know that it usually takes more than just a lack of water to turn productive land into a desert. There are several specific human activities that when combined with a lack of rainfall encourage desertification. For example, over-cultivation, growing more crops than soil can support. The soil loses its nutrients, so it needs either to be fertilized or to be left unused for at least a season. But if neither of these things happens, if these nutrients in the soil don't get replaced, the damaged soil stops producing. Another cause of desertification is overgrazing. That's when the grasses and trees and shrubs of an area are expected to feed more animals than they reasonably can. Too many animals eating in the same area will kill the vegetation. And it's because it's the roots of this vegetation that hold much of the soil together, when too much of the vegetation dies, the soil corrodes. But maybe the most paradoxical example of human behavior. that can lead to desertification is irrigation. It may seem to run counter to common sense to say that introducing water into an area can cause it to become more like a desert. But there are plenty of bad irrigation practices that do just that. Bringing in too much salty water and then not providing adequate drainage for it will till the soil with salt, and turn the area into a desert.
(30)
A．Over 87,000 workers will lose their jobs in auto companies.B．Many people will have t
听力原文：W: I was working on a paper about the differences between women and men. I have been thinking about it all these days，but no satisfactory results come out．
M: Ah，you may not realize you're working on a complicated philosophical issue．
W: I know exactly that men and women are different．They sometimes don't understand each other at all．
M: I agree．Men and women are interested in different topics when they are talking．Last weekend，John and I went to a ball game．When we're at the game，We talked about the players and what's going on in the game and nothing else．I think women wouldn't do that.
W: You bet! Yesterday，a friend and I sat at a cafe and talked about noting，and everything! Um…about my Sister's new baby... and about when she could go back to work…and you know，who should take care of the baby…things like that．
M: When a woman talks With a man，she'll often feel as though he wasn't really listening or that he wasn't really having a conversation, right？
W: Yeah，that sounds very familiar to me．
M：And I think a mall doesn't understand What the woman really wants from him．
W: I guess he probably wonders “what's her point？”，“where's this conversation going？”
M：To speak from experience，for a man，talking is generally more straightforward—it's about giving and getting facts．Men generally don't base their friendships on talking，but on doing—getting together with buddies，playing sports or hanging out．
W: Well，for me，a best friend is someone I can be close with and talk to．I can talk with her in detail about everyday events in our lives．We share feelings and secrets. This offers a chance to better understand our world and ourselves．
(20)
A．Dave is intelligent.B．Dave knows a lot about art.C．Dave is very logical.D．Dave is th
微信支付 
支付宝支付