問題詳情


(B)Around the world, a startling effect known as sea sparkle is increasingly being observed.Sea sparkle is caused by a single-cell marine organism that can behave like an animal or a plant.It is usually colorless, pink, or red during the day. At night, if it is __(46)__ by movement, theorganism creates a glowing blue color a little like the neon lighting on some street signs.Instances of sea sparkle are regularly observed near the shores and harbors of Hong Kong.Closer to home, it’s also possible to see sea sparkle at the bay of Taiwan’s Matsu island duringthe spring and summer months. Tourists and locals have been attracted by this mysterious__(47)__, but what is causing it? Scientists believe that the presence of sea sparkle is a causefor __(48)__ about the health of the world’s oceans. While it looks pretty, sea sparkle may beevidence of pollution, since the organism that creates the effect is thought to grow in uncleanwaters. Experts are still not completely sure about what causes these organisms to “bloom”worldwide. The main theory is that pollution from farming is to blame. Pollution fromsewage and household wastes may also __(49)__ the problem.     Although sea sparkle is not dangerous itself, it’s a sign that all is not well in our oceans.Furthermore, the organism that causes this effect feeds on and is eaten by other tiny sea__(50)__. This means it could be upsetting the food chain in the sea. Right now, it’s not clearwhat the long-term effects of sea sparkle might be. However, the next time you see a sparklingblue sea, you may think twice about how clean it is.
46.
(A) assumed
(B) disturbed
(C) conveyed
(D) instructed

參考答案

答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)

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