【单选题】This was before the steam locomotive, and canal building was at its height. The companies building the canals to transport coal needed surveyors to help them find the coal deposits worth mining as wel...
A.
The discovery of regional differences in the sequences of rocks led geologists to believe that rock types could some day become reliable time markers.
B.
Careful analysis of strata revealed that rocks cannot establish geological time because the pattern of rock layers varies from place to place.
C.
Smith's catalogs of rock strata indicated that the sequences of rocks are different from place to place and from region to region.
D.
Because people did not catalog regional differences in sequences of rocks, it was believed that rocks could never be reliable time markers.
【简答题】单词拼写。 1. It is reported that the best-seller of the famous novelist has been t_____ into many foreign languages. 2. It is not as c_____ as it was to go to school, for the new house is farther away. 3....
【简答题】In the novel "Invisible Man" by Ralph Ellison, the novelist uses rich symbolism. Many things describled in the novel has symbolic meanings. Please cite some examples of symbols in the text and make an...