【简答题】Mrs. Thompson came to the 5 th grade class and noticed that Teddy was always alone. Also, he did badly in his studies.When she reviewed Teddy’s past records,she find he was a good child at first,but h...
【单选题】听力原文:We currently believe that the earths crust-the rocky part of the earth-is composed of several large, rigid plates. These plates are being created at some edges and being destroyed at others. They...
A.
Wilson developed a warning system for earthquakes.
B.
Wilson wrote an article that contradicted scientific law.
C.
Wilson first proposed the theory of plate tectonics.
D.
Wilson discovered sea floor spreading in the North Atlantic.