A.The Hudson River
B.The Potomac River
C.The Ohio River
D.The Missouri River
[单选题]( )is the dividing line between the South and North of America.A.The Hudson
[单选题]( )is the dividing line between the South and North of America.A.The Hudson
[单选题]One-roomschoolhouse can still be found in [isolated] areas of North America
[问答题]There is not a marked difference in size between China and the United State
[问答题]()He has a foreign friend who lives in America.
[单选题]( )is the first line of protect between your computer and the public Internet.A.The Internet protocolB.The firewallC.The anti-virus software D.The intrusion-detection systems
[判断题]There are three major routes of container transportation: Far East to North
[判断题]There are three major routes of container transportation: Far East to North
[问答题]If you travel by air across the center of Africa or South America,you flyov
[单选题]Yalu river forms anatural [boundary] between Chinaand North Korea.A.borderB