Question 10-13
题型： Sentence completion
Complete the sentences below.
Choose ONE MORE THAN TWO WORDS from the passage for each answer.
| Q10: | Long before the invention of radar,........................had resulted in a sophisticated radar-like system in bats. |
| Answer: | natural selection |
| Information in the text: | Paragraph E (line 1): …but all the world now knows that bats, or rather natural selection working on bats, had perfected the system tens of millions of years earlier… |
| Q11: | Radar is an inaccurate term when referring to bats because........................are not used in their navigation system. |
| Answer: | radio waves |
| Information in the text: | Paragraph E (line 4): It is technically incorrect to talk about bat 'radar', since they do not use radio waves. It is sonar. |
| Q12: | Radar and sonar are based on similar ........................ |
| Answer: | mathematical theories |
| Information in the text: | Paragraph E (line 5): But the underlying mathematical theories of radar and sonar are very similar, and… |
| Q13: | The word 'echolocation' was first used by someone working as a ........................ |
| Answer: | zoologist |
| Information in the text: | Paragraph E (line 7): American zoologist Donald Griffin, who was largely responsible for the discovery of sonar in bats, coined the term 'echolocation' to… |
责任编辑：虫虫
