10. A. on B. near C. without D. from
分析:逗号后面的one应该是指a sound alarm,从连词but可以推断,前后应是意思相反,后面已有了with, 那么前句应是without, 所以选择C。读读意思很通顺。
9. Withington studies how the brain __11____sounds at the university.
A processes B. produces
C. possesses D. proceeds
分析:句子主语是the brain应和处理构成主谓关系,而其它动词均不合适,所以选择A。
10. She says that the __12___ of a wide band of frequencies can be pinpointed more easily than the source of a narrow band.
12. A. feature特征 B. quality质量、素质
C. diagram图解 D. source来源
分析:解题关键是要看出句子中主要结构是morethan, 后面出现核心词the source, 所以可以推断得出结论,前面的名词也应是source.这样符合比较级用法,用来进行比较的事物必须具有可比性。所以选D。
11. Alarms ___13____ the same concept have already been installed on emergency vehicles.
A. basis on B. base on C. basing on D. based on
分析:Alarms是主语,have already been installed是谓语,所以要填的动词应该是分词形式,做定语,所以四个答案只有D可能, be based on以。。。为基础。
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