Believed to originate from a small area on their foreheads, elephants emit low-f

游客2024-01-13  23

问题 Believed to originate from a small area on their foreheads, elephants emit low-frequency sounds that may be used as a "secret language" to communicate with other members of the herd.

选项 A、Believed to originate from a small area on their foreheads, elephants emit low-frequency sounds that may be used
B、Elephants emit low-frequency sounds that are believed to originate from a small area on their foreheads, and they may use this
C、Elephants emit low-frequency sounds, believed to originate from a small area on their foreheads, that they may use
D、Originating, it is believed, from a small area on their foreheads; elephants emit low-frequency sounds they may use
E、Originating, it is believed, from a small area on their foreheads, low-frequency sounds are emitted by elephants that may be used

答案 C

解析 首句出一个believed过去分词短语,找主句主语elephants。而elephants不能作believedto短语的逻辑主语,因为代入后“大象被认为是起源于它们(指大象)前额上的一小块地方”,让人无法理解;B中的this有问题,在this之前唯一的单数名词是a small area,但原句指用low-frequency sounds作为“秘密语言”,两者不对应且公理中提到过“不用this单独指代”的原则;D中elephants不可能是originating短语的逻辑主语;E中:low-frequency sounds的确是originating的逻辑主语,但句末的定语从句却改变了句意,变为“大象被用来作为语言”。正确答案是C:low-frequency sounds有两个修饰成分,第一个过去分词作插人语限定;第二个是that从句作限定性定语从句。
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