4．
Diaoyu Dao and its affiliated （附属） islands，which consist of（由…组成）Diaoyu Dao，Huangwei Yu，Chiwei Yu，Nanxiao Dao，Beixiao Dao，Nan Yu，Bei Yu，Fei Yu and other islands，are in the northeast of China's Taiwan Island，in the waters between 123°20'-124°40'E （东经） and 25°40'-26°00'N （北纬）．They belong to the Taiwan Island．The total area of these islands is about 5.69square kilometers．
Diaoyu Dao，in the western tip of the area，covers an area of about 3.91square kilometers and is the largest island in the area．The highest part on the island stands 362meters above the sea level．Huangwei Yu，which is about 27kilometers to the northeast of Diaoyu Dao，is the second largest island in the area，with a total area of about 0.91square kilometers and a highest height of 117meters．Chiwei Yu，about 110kilometers to the northeast of Diaoyu Dao，is the easternmost island in the area．It covers an area of about 0.065square kilometers and stands 75meters above the sea level．
Ancient ancestors （远古祖先） in China first discovered and named Diaoyu Dao through their fishing activities on the sea．In China's historical books，Diaoyu Dao is also called Diaoyu Yu or Diaoyu Tai．The earliest historical record of the names of Diaoyu Dao，Chiwei Yu and other places can be found in the book Voyage with a Tail Wind published in 1403．It shows that China had already discovered and named Diaoyu Dao by the 14th and 15th centuries．
These historical reports clearly show that Diaoyu Dao and Chiwei Yu belong to China．The sea waters around Diaoyu Dao is traditionally（传统）Chinese fishing ground．Chinese fishermen have been involved in fishing activities in these waters for generations（世代）．
52．Where is Diaoyu Dao？D
A．In the northeast of China．
B.25°40'-26°00'E．
C．In the northwest of Taiwan Island．
D.123°20'-124°40'E．
53．The largest island of Diaoyu Dao isC meters taller than the second largest one．
A.75meters
B.117meters
C.245meters
D.362meters
54．How did ancient Chinese people find Diaoyu Island？C
A．They grew up there．
B．They wrote historical books there．
C．They worked and fished on the sea there．
D．They drank water there．
55．Which of the following is NOT true？B
A．Diaoyu Dao has more than 8islands．
B．Huangwei Yu is about 110kilometers to the northeast of Diaoyu Dao．
C．China had already named Diaoyu Dao by the 14th and 15th centuries．
D．The sea waters around Diaoyu Dao is traditionally Chinese fishing ground．
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