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- 2019-7-15
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Though the law will require emissions testing of all diesel vehicles, from tractor trailers to excursion buses, it will have no effect on sport utility vehicles, almost all of which are gasoline powered, and will not be subjected to emissions-control standards as stringent as they are for diesel-powered vehicles.
- Cpowered and therefore not subject to emissions-control standards as stringent as those for
- Dpowered, which are not subject to emissions-control standards as stringent as they are for
- 答案是C。我对这里的代词不是很清楚。有多个复数名词,如果they指代不明的话,those应该也指代不明吧。然后D选项的which are有问题吗?谢谢
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