扫描二维码，直接登录
题库 / Prep2007E1-SC-63
Unlike emergency calls that travel through regular telephone lines, where they thus automatically inform the operator of the location and phone number of the caller, cellular calls require emergency operators to determine the location of the caller.
lines, where they thus automatically inform the operator of the location and phone number of the caller, cellular calls require emergency operators to determine the location of the caller
lines and thus automatically inform the operator of the location and phone number of the caller, cellular calls require emergency operators to determine the location of the caller
lines, thus automatically informing the operator of the location and phone number of the caller, the location of the caller on a cellular phone has to be determined by the operator
lines, and thus automatically inform the operator of the location and phone number of the caller, emergency operators have to determine the location of the cellular phone caller
lines, thus automatically informing the operator of the location and phone number of the caller, emergency operators receiving a cellular call have to determine the location of the caller
A将其作为telephone lines的一个特征，比较的逻辑不恰当。
A，where引导的定语从句，这里是非限制性，去除不影响原句意思，但是后半句划线部分明显体现了需要告知的动作，因此该选项不合适，排除
B correct
where指代tele lines，定位在电话线里是童话故事
A将其作为telephone lines的一个特征，比较的逻辑不恰当。
a选项中where指代telephone lines，是抽象名词，但是where只能代指具体名次，所以用法错误
语义：比较emergency calls和cellular calls
语法：
BCD选项：比较对象不对等，排除；
A选项：Where在这里修饰lines，个人觉得无语法错误，但是合理句意应该比较的是emergency calls和cellular calls的特征，因此A逻辑上不合理。排除（这一点不确定）
Unlike+名词 thus 句子？这个结构怎么理解
A选项，they 指代不明，而且where只能修饰地点名次，modifier错误，排除
然后看A B, A中WHERE 只可指代具体地点，同时and thus automatically inform与前面的travel平行，排除A