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查看完整版： 全新版大学英语教程4课后答案

Unit 1

四、练习答案
Comprehension
Content Questions
lt refers to the raw, bitter, bleak Russian winter.He expected the conquest of Russia in five weeks.
3Instead of fighting, they retreated eastward, burning their crops and homes as they went. Theylet the Russian winter fight the war for them while they bided their time.
4Napoleon discovered that the occupation of the city was an empty victory because theRussians fled their capital leaving him almost nothing at all.
They suffered heavy losses as a result of the extreme cold and the Russians’hit-and-runattacks.
Napoleon abdicated and went into exile.
Hitler began his invasion of the Soviet Union on June 22,1941 without a declaration of war.He expected the campaign to last no longer than three months by using the so-called “lightningwar"tactics.
8No, he wasn't. He instructed the Russian people to“scorch the earth” in front of the Germaninvaders.
The people of Leningrad refused to surrender and put up a heroic, stiff resistance.
10An early，severe,cold winter,to a large extent，slowed down the German advance onMoscow.

Unit 2
四、练习答案
四、练习答案
Comprehension
Content Questions
The automobile industry ranked as among the most lucrative and powerful industries of thetwentieth century.
Cars and roads will be revolutionized in the twenty-first century.
3Because it is sensors that will enable vehicles and roads to be able to see, hear，feel， smell,talk, and act.
Sensors can sense if a driver is drunk and refuses to start up the engine.
The radars hidden in the bumpers can scan for nearby cars. If you make a serious drivingmistake, the computer will sound an immediate warning.
lf the driver's eyelids close for a certain length of time and his or her driving becomes erratic,a computer in the dashboard could alert the driver.
GPs makes it possible for smart cars to determine their location on the earth to within about ahundred feet.
With the price of microchips dropping so drastically, future applications of GPs are virtuallylimitless.


查看完整版： 全新版大学英语教程4课后答案


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