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My son and I became lost while hiking high in the southern Rockies. I immediately went to work with my map and compass to determine where we had gone off course. My son, an electronics engineer, produced from his pack a hand-held Global Positioning System receiver.

"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.遠足；徒步旅行

(2) Rockies n.（美國）落基山脈

(3) compass n.羅盤

(4) go off course 走下了道

(5) electronics n.電子學

Exercises:

根據短文選擇正確答案：

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.

我們在那座山上

落基山脈徒步旅行時，由于爬得太高，我和兒子都迷了路。我立刻拿出地圖和羅盤來確定我們是在哪幾走錯了路。我的兒子是位電子學工程師，他卻馬上從包里拿出一個全球定位系統接收器。他很小心地把儀器鎖定在地球上空的四個衛星上，認真地看了看儀器上的圖。然后他自豪地宣布道：“我知道我們的確切位置了。我們就在那邊的那個山上！”

練習參考答案：

① D ② B ③ C ④ D ⑤C