题干

河流的水系特征与水文特征都取决于流域内的地形、气候和人类活动。人类活动是通过改变下垫面而产生影响的,例如:人类砍伐植被会导致地表径流增加,河流水位陡涨陡落,含沙量变大,(泥沙)淤积河道,河床抬升;植树种草会减少地表径流,河流水位涨落幅度变小,含沙量变小。硬化路面(水泥路面)会增加地表径流,河流水位陡涨陡落;铺设渗水砖会减少地表径流,增加地下径流,河流水位涨落幅度变小。修水库可以调节河流的流量,使下游水位平稳,减少下游河流泥沙含量。围湖造田会使湖泊调节作用减弱,水位陡涨陡落。

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①数量多(我国地热资源大省);分布广,相对集中在西部、南部;质量优(全国较为罕见)。②地层断裂带广泛发育,地球内能释放;亚热带季风气候,降水多,下渗水分受到地球内能加热,出露地表形成温泉。

同类题4

下面文章中有五处需要添加小标题。请从以下选项(A、B、C、D、E 和F)中选出符合各段意思的小标题。选项中有一项是多余选项。

A. Be a Good Listener               B. Care About the Small Acts

C. Begin a Conversation             D. Make Time for Friendships

E. Give a Hand to New Neighbors     F. Remember Their Names

5 Ways To Build Friendship with Your Neighbors

    ①____

    Often neighbors don't even know each other's names. But it's okay to be the one to break the ice. So as you see them at work in their yards, smile, wave and say hello. Ask how their kids are or what they think of the price at the local supermarket.

    ②____

    Your new neighbors may be feeling lonely and unsure, especially if they're far from home. Your help will be welcomed by them. Leave your telephone number to them. If they have any questions, they can call you.

    ③____

    Most of us find it difficult to remember people's names. Writing down the names of your neighbors and note about them, such as "Frank and Jill—Bob's neighbor," helps you remember their names. The next time we see Frank and Jill, we try to call them by name.

    ④____

    If you value a friendship with your neighbors, spend time with them. What better way to meet your neighbors than to invite them to a pool party or holiday open house? Chat with each for five minutes to get an idea of what your neighbors are like so that you can plan for food and music.

    ⑤____

    In a good relationship, it's really the little things that count. Help to bring in the mail for the elderly neighbor when there is a heavy rain. When your neighbor forgets to take in his rubbish cans, roll them back into his yard.