Questions 1-4 Reading Passage 1 has six paragraphs A-F. Choose the most suitable headings for paragraphs B-E from the list of he

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问题 Questions 1-4
Reading Passage 1 has six paragraphs A-F.
Choose the most suitable headings for paragraphs B-E from the list of headings below.
Write the appropriate numbersⅠ--Ⅸ in boxes 1-4 on your answer sheet.
      List of Headings
Ⅰ  How the reaction principle works
Ⅱ  The impact of the reaction principle
Ⅲ  Writers’ theories of the reaction principle
Ⅳ  Undeveloped for centuries
Ⅴ  The first rockets
Ⅵ  The first use of steam
Ⅶ  Rockets for military use
Ⅷ  Developments of fire
Ⅸ  What’s next?

*

选项 A、from the tenth to the thirteenth centuries.
B、from the seventeenth to the nineteenth centuries.
C、from the early nineteenth to the late nineteenth century.
D、from the late nineteenth century to the present day.

答案D

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