"I know exactly where we are, " he proudly announced, after carefully locking the instrument on four satellites high above the earth and checking his map. "We're on that mountain there!"
Notes:
(1) hike v.远足；徒步旅行
(2) Rockies n.（美国）落基山脉
(3) compass n.罗盘
(4) go off course 走下了道
(5) electronics n.电子学
Exercises:
根据短文选择正确答案：
① Why did the mother and son become lost in the southern Rockies?
A. Because they were hiking.
B. Because the Rockies were too high.
C. Because they were climbing too high.
D. Because they had gone off course.
② What's the use of a compass?
A. to determine where people have gone off course.
B. to show people the correct direction.
C. to make people confused about direction.
D. to make people work well
③ What was the son?
A. a mechanic
B. a tourist guide
C. an electronics engineer
D. a traveller
④ How many satellites did the son lock the instrument on?
A. One
B. Two
C. Three
D. Four
⑤ What do you think of the son's way to solve the problem?
A. It was a clever way.
B. It was the only way.
C. It wouldn't solve their problem.
D. The son took too much of himself.
我们在那座山上
落基山脉徒步旅行时，由于爬得太高，我和儿子都迷了路。我立刻拿出地图和罗盘来确定我们是在哪几走错了路。我的儿子是位电子学工程师，他却马上从包里拿出一个全球定位系统接收器。他很小心地把仪器锁定在地球上空的四个卫星上，认真地看了看仪器上的图。然后他自豪地宣布道：“我知道我们的确切位置了。我们就在那边的那个山上！”
练习参考答案：
① D ② B ③ C ④ D ⑤C
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