中国大学MOOC: Thefollowing sentences are from one paragraph. Decide which one is the topic sentence of the paragraph?1)In time, this melted part rises as a magma.2)The formation of a volcanic eruption is a dramatic series of events.3)As the plate sinks, friction and the earth’s heat cause part of it to melt.4)The magma produces heat, steam, and pressure.5)First of all, most volcanoes are formed where two plates collide.6)Then one of the plates is forced under the other and sinks.7)When the heat, steam, and pressure from the magma finally reach the of the Earth, volcanic eruption occurs.
举一反三
- In the first part of the story, from paragraph one to paragraph three, paragraph two is a transitional one. A: True B: False
- Which one is NOT a disaster?( ) A: D. death toll B: A. tsunami C: B. typhoon D: C. volcanic eruption
- When large decrease in turbine load the steam from the steam generators is sent to the A: steam condenser B: atmosphere C: steam dump system D: heat exchanger
- 中国大学MOOC: The example paragraph is different from the list paragraph , in which example sentences support the topic sentence disorderly.
- All the sentences in a paragraph should focus on ______ central topic(s).（ ） A: two B: one C: four D: three