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To map Earth’s interior, geologists use a n etwork of seismometers to chart seismic waves that originate in the earth’s crust and ricochet around its interior, most rapidly traveling through cold, dense regions and slower through hotter rocks.
A interior, most rapidly traveling through cold, dense regions and slower
B interior, which travel most rapidly through cold, dense regions, and more slowly
C interior, traveling most rapidly through cold, dense regions and more slowly
D interior and most rapidly travel through cold, dense regions, and slower
E interior and that travel most rapidly through cold, dense regions and slower 正确选项是C。 但是我记得Ron曾经说过,逗号+doing,那这个doing一定是主句SVO的S发生的动作。 但这里很明显traveling是seismic wave 发出来的。 然后OG的官方解释的是traveling修饰的是这里的ricochet这个动作。 感谢各位大神!!!!
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