【单选题】—How long they ? —About 10 years.
B.
have ; been married C . were ; married D. did ; marry
【单选题】How long did Juan Martinez do nature program in Wyoming in Track2-3?
【单选题】How did Juan Louis start his speech?
A.
By reflecting on Americans' previous failures in predicting earthquakes.
B.
By noting where the most severe earthquake in U. S. history occurred.
C.
By describing the destructive power of earthquakes.
D.
By explaining some essential geological principles.
【判断题】混合刀法是直刀法,平刀法,斜刀法的综合运用。 ( )
【简答题】How long did the baseball ?
【单选题】子集N的对称集合S(N),不是一个普通的集合,而是一个具有()的集合。
【判断题】子集N的对称集S(N),不是一个普通的集合,而是一个具有代数结构的集合。
【单选题】子集N的对称集合S(N)不是一个普通集合,它是一个具有()的集合。