50. In order to understand the passage better, which topic should be researched?
(A) How are modern communication devices better than carrier pigeons?
(B) How did the Duke of Wellington defeat Napoleon at Waterloo?
(C) How were carrier pigeons trained for use during wartime?
(D) What types of medals were awarded for bravery during World War I?

46. To learn how to send messages via carrier pigeon, a student should research which of the following topics? (A) capture (B) habitat (C) training (D) anatomy

47. In paragraph 2, "snapping up" means (A) giving away. (B) destroying. (C) throwing out. (D) buying.

48. Which of the following statements from the passage supports the author's conclusion that carrier pigeons sometimes had a dangerous job? (A) In 1815 an English banker named Nathan Rothschild made his fortune by relying on messages sent to him by carrier pigeons. (B) Since they could easily be released from airplanes or ships, every branch of the armed services used the birds. (C) On his last mission, though wounded, he carried a message that saved the lives of 194 American soldiers. (D) Many people find carrier pigeons ugly because of their big wattle, a knobby buildup of skin on the beak.

49. The author provides specific dates throughout this passage in order to (A) show that carrier pigeons are more important in modern times than they were in the past. (B) indicate the impact of carrier pigeons at significant points in history. (C) explain the causes and effects of world events. (D) avoid confusing the reader when switching back and forth between the past and present times.

1. 乙類大客車係指軸距未逾 4 公尺且核定總重量逾 4.5 噸之大客車。(A)O(B)X

2. 汽油抗爆性以辛烷值號數表示，號數愈大，抗爆性愈高。(A)O(B)X

3. 汽車引擎輸出扭力與排氣量成正比但與制動平均有效壓力成反比。(A)O(B)X

4. 幼童專用車指專供載運未滿 7 歲兒童的客車。(A)O(B)X(C)送分

5. 引擎冷卻系統之節溫器，主要功能是使引擎很快達到正常工作溫度，以免冷車運轉時間延長。(A)O(B)X

6. 汽車行駛性能外部阻力，係引擎產生之動力經傳動系統各機件到驅動輪胎接觸路面，其間均有機械摩擦力存在，造成動力損失。(A)O(B)X