2. 外语
  3. Complete the summary below. Choose NO MORE THAN THREE WORDS from the passage for each answer. Write your answers in boxes 18-25

Complete the summary below. Choose NO MORE THAN THREE WORDS from the passage for each answer. Write your answers in boxes 18-25

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问题 Complete the summary below.
Choose NO MORE THAN THREE WORDS from the passage for each answer.
Write your answers in boxes 18-25 on your answer sheet.
Exploring the ancient city of Pteria
Archaeologists began working ten years ago. They started by taking photographs of the site from the ground and then from a distance in a【D1】______. They focused on what lay below the surface using a magnetometer, which identifies variations in the magnetic field. These variations occur when the【D2】______in buried structures have changed direction as a result of great heat. They line up with the surrounding magnetic field just as a【D3】______would do.
The other remote-sensing technique employed was resistivity. This uses a【D4】______ to fire electrical pulses into the earth. The principle is that building materials like【D5】______and stone do not conduct electricity well, while【D6】______does this much more effectively. This technique is mainly employed during the【D7】______, when conditions are more favourable. Resistivity is mainly being used to【D8】______ some images generated by the magnetometer.
【D2】
选项
答案iron particles
解析 利用细节词“magnetometer”，“changed direction”和“great heat”定位于原文D段落中间“If something containing iron oxide was heavily burnt，by natural or humanactions，the iron particles in it can be permanently reoriented,like a compass needle，toalign with the Earth’s magnetic field…”，这里“heavily burnt”对应题目的“greatheat”，“reoriented”对应“changed direction”，所以正确答案为iron particles和compass／compass needle。
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