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题库 / OG2021-SC-866
Dinosaur tracks show them walking with their feet directly under their bodies, like mammals and birds, not extended out to the side in the manner of modern reptiles.
Dinosaur tracks show them walking with their feet directly under their bodies, like
Dinosaur tracks show that they walked with their feet directly under their bodies, as do
Dinosaurs left tracks that showed them walking with their feet directly under their bodies, like
The tracks that dinosaurs left show that they walked with their feet directly under their bodies, as do
In the tracks they left, dinosaurs are shown walking with their feet under their bodies, like
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C选项，like表示名词间的比较，要求对比的对象是对等的，则有mammals and birds和Dinosaur 比较，然而C的主干是Dinosaurs left tracks，所以逻辑变成跟哺乳动物和鸟类一样，恐龙也留下了足迹。明显错误，因为逻辑上要对比的是2者走路的方式是相似的
D as的要求并没有like那么严格，它们其实并不需要主语是对等的。比较的核心在于谓语动词那。虽然D的主干是‘tracks show that，但是as的对比结构可以直接对比that从句的内容（因为不要求主语的语法平行，比如哺乳动物一定要对比到dinosaurs的位置上）。所以D选项重点是’就像哺乳动物和鸟类walked （被助动词do代替）with xxx，they （指代恐龙）也walked with xx
如果用like，like前后的内容应该是可以替换的，比如 Like my brother, I like swimming in the afternoon. 如果把brother和后面连接，也是合理的：my brother like ……，对语义不产生影响，但是这个题如果按C的说法，就成了，哺乳动物和鸟也left tracks that showed……，但是原文的意思是比较他们的走路方式，而非比较他们都留下足迹
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