In the reading passage, the author points out that the magma mound formed for several reasons. Theophrastus's lecture deal with the same issue. However, he thinks these reasons are indefensible, which contracts with the leading state. He uses three special points to support his idea.
First, the author of the reading passage suggests that in view of the record that the native American had built similar things, these mama mound were constructed by them.However, the professor argues in the lecture that it can't be man-made since no human relics are found in such place.
Moreover, contrary to the statement in the reading passage that formation of these mimic mound is the earthquake due to the surrounding loose earth, the professor contends that mimic mound did not occur in any other places where experienced earthquake.
Finally, the reading passage claims that kind of ground squirrels made this whereas the professor asserts that no one has ever seen kind of ground squirrels in that place.
In conclusion, the professor clearly identifies the weaknesses in the reading passage and convincingly shows that the three reasons given by the author man-made. Earthquake-madeandround-squirrels-made are incorrect.
可以用易改来改作文 挺好用的