题干

在下面一段文字横线处补写恰当的语句,使整段文字语意完整连贯,内容贴切,逻辑严密。每处不超过15个字。

    海岸侵蚀是指由海水动力的冲击造成海岸线后退和海滩下蚀的地质现象。导致海岸侵蚀的原因虽然有很多,①____。例如:沿岸采沙直接减少了海岸陆域面积,沿岸开采地下水使地基产生沉降,而开采珊瑚礁、采伐红树林等活动则使海岸失去庇护。②____,我国则是侵蚀灾害最为严重的国家之一。在防治海岸侵蚀时,一些欧美国家在重要的岸段划有预警线,③____。而在我国不少的旅游海岸,别墅和娱乐设施直接建在沙滩上,这就极易酿成灾祸。

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答案(点此获取答案解析)

但是人类活动是重要原因,世界范围内普遍存在海岸侵蚀,在预警线内不得修建人工建筑

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Forget Cyclists, Pedestrians are Real Danger

We are having a debate about this topic. Here are some letters from our readers.

■Yes, many cyclists behave dangerously. Many drivers are disrespectful of cyclists. But pedestrians are probably the worse offenders.

People of all ages happily walk along the pavement with eyes and hands glued to the mobile phone, quite unaware of what is going on around them. They may even do the same thing while crossing a road at a pedestrian crossing or elsewhere. The rest of us have to evade (避让) them or just stand still to wait for the unavoidable collision.

The real problem is that some pedestrians seem to be, at least for the moment, in worlds of their own that are, to them, much more important than the welfare of others.

——Michael Horan

■I love the letter from Bob Brooks about cyclists (Viewpoints, May 29). I am afraid they seem to think they own the roads.

I was walking across Altrincham Road one morning when a cyclist went round me and on being asked what he was doing he shouted at me.

The government built a cycle lane on the road but it is hardly used.

The police do nothing. What a laugh they are!

The cyclists should all have to be made to use the cycle lanes and wear helmets, fluorescent (发荧光的) jacket and lights at night and in the morning they should pay some sort of tax and be fined for not wearing them.

——Carol Harvey

■Cyclists jump on and off pavements (which are meant for pedestrians), ride at speed along the pavements, and think they have a special right to go through traffic lights when they are on red.

I was almost knocked down recently by a cyclist riding on the pavement when there was a cycle lane right next to him.

Other road users, including horse riders, manage to obey the rules so why not cyclists?

It's about time they had to be registered and insured, so when they do hit a pedestrian or a vehicle, or cause an accident, at least they can be treated and there might be an opportunity to claim.

——JML

Write to Viewpoints of the newspaper.