全新版大学进阶英语综合教程第二册答案U5KeytoExercises

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Unit 5 Pioneers of Flight

Key to Exercises

Opener

A Mighty Airplane Built by Howard Hughes in 1947

LengthIt was 220 feet long.

HeightIt was higher than a five-story building. WeightIt weighed about 60 tons. It had to make the trip from Culver city in California to the Pacific, Trip

which is 30 miles away.

Reading & Interacting

I. Understanding the Text

1. Text Organization

When it happenedThe heroHow it relates to modern aviationStory

Wan Hu' s crazy dream containsthe Wan HuA.D. 15001

principles of rocket-powered spaceflight.

Many of the design features of the Spruce HowardOn November 2,

2Goose havebeenincorporatedinto 1947Hughes

modern cargo planes.

The flying devices with flapping wings About 500 yearscontrolled and steered by human pilots heLeonardo 3

da Vinciinspiredesigned stillagopeople to pursue

their dreams of flying freely in the sky.

2. Comprehension Check

2.1 Focusing on the main ideas

The article consists of three stories about pioneers

of flight. The first story is

about a Chinese named Wan Hu, who made an unsuccessful attempt at spaceflight

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in A.D.1500. He built a spaceship powered by 47

rockets using gunpowder. His

idea was crazy, but his dream of flight came true 500 years later when China