Khóa học phần nghe toefl itp 20 câu sau theo bài Hướng dẫn và trắc nghiệm nghe toefl itp thuộc 20 câu sau – Mã 97104750 30 Th9 Press to start in video What is the purpose of the talk? To provide background for the next reading assignment. To explain the answer to an examination question. To demonstrate the use of a new measurement device. To review what students know about volcanic activity. What important discovery about seismic waves does the instructor mention? They travel through the Earth’s interior. They can withstand great heat. They can record the Earth’s internal temperature. They occur at regular intervals. What did the study of seismic vibrations help geologists learn more about? Why lava is hot. The composition of the Earth’s interior. When the Earth was formed. How often a volcano is likely to erupt What did P and S waves help scientists discover about the layers of the earth? What purpose they serve. How hot they are. Where earthquakes form. How deep they are. Loading … Đọc thêm Hướng dẫn và trắc nghiệm nghe toefl itp thuộc 20 câu sau - Mã 97103134[related_posts_by_tax title=""]