第Ⅰ卷 选择题

Part Ⅰ  Vocabulary and Structure

Directions:

    There are 20 incomplete sentences in this section. For each sentence there are four choices marked A, B, C, and D. Choose the ONE answer that best completes the sentence. Then mark the corresponding letter on the Answer Sheet with a single line through the center.

1、 ______ means the property of having two levels of structures, such that units of the primary level are composed of elements of the secondary level and each of the two levels has its own principles of organization.

   A. Creativity          B. Duality    ……此处隐藏39741个字…… ud, we get used to them, while some big noises we can't endure, they do harm to our health. Today noise pollution is a common phenomenon, and we can't get away from them. The enduring extremely loud noise weakens people, so we should have the consciousness to protect us from those noises.

    It is impossible to avoid all noises. But we can take measures to reduce noise. For instance, we can plant more trees to reduce the pollution because trees can help absorb sound. Besides, many cities forbid cars pushing horn in the evening or in city centre. What's more, I think the government should take more measures to reduce noise, so that people can live in a peaceful environment!