【单选题】听力原文: The flag, the most common symbol of a nation in the modem world, is also one of the most ancient. With a clear symbolic meaning, the flag in the traditional form. is still used today to mark bui...
【单选题】At 18, Ashanthi DeSilva of sub Cleveland is a living symbol of one of the great intellectual achievements of the 20th century. Born with an extremely rare and usually fatal disorder that left her...
A.
show the promise of gene-therapy
B.
give an example of modem treatment for fatal diseases
C.
introduce the achievement of Anderson and his team
【单选题】听力原文: The flag, the most common symbol of a nation in the modern world, is also one of the most ancient. With a clear symbolic meaning, the flag in the traditional form. is still used today to mark bu...
【单选题】At 18, Ashanthi DeSilva of sub Cleveland is a living symbol of one of the great intellectual achievements of the 20th century. Born with an extremely rare and usually fatal disorder that left her...
A.
show the promise of gene-therapy
B.
give an example of modern treatment for fatal diseases
C.
introduce the achievement of Anderson and his team