1998年长江汛期流量比1954年小，而中游水位却比1954年高，其主要人为原因是（   ）①降水集中，所有支流同时来水②上游乱砍滥伐森林，中游泥沙沉积加剧

③围湖造田，湖面缩小，调蓄能力减弱④江堤年久失修，沿途挖沙失控

【严防暴力袭击、学会保护自我】观察下图，回答问题。
  

Li Ming (L) and John (J) have just finished swimming.
L: How nice and cool the water is! But I’m feeling a bit hungry now. ____ 
J: Sounds good.
L: ____ 
J: Yes, there is.
L:____ 
J: It’s only five minutes’ walk. Let’s go.
L: Yeah. Oh, I almost forgot my CD player.
J: Oh, it’s over there. ____ 
L: Pop music. I often listen to it when I’m not busy. How about you?
J: Light music. I think it can relax myself. ____ 
L: Sure.
J: OK. I can lend you some CDs. I’ll bring them to school tomorrow.
L: Thanks.