【单选题】Question 24 What do we learn about the students of Kilip Elementary?
A.
Most of them come from low-income families.
B.
Many have become national chess champions.
C.
A couple of them have got involved in crimes.
D.
Many became chess coaches after graduation.
【单选题】What question do we face due to the change of the environment?
A.
How to revolutionize the way we treat human disease.
B.
How to live in a time of great change.
C.
How to develop a pattern for sustainable existence.
D.
How to share a small planet with other peoples.
【单选题】Question 19. What do we learn about the Vikings?
A.
They were the first settlers in Europe.
B.
They were the conquerors of Norway.
C.
They discovered Iceland in the ninth century.
D.
They settled on a small island north of England.
【单选题】以下各组数中,成为模10的简化剩余系的是( )
【单选题】以下各组数中,成为模 10 的简化剩余系的是( ) A .1,9, - 3, - 1 B .1, - 1,7,9 C . D .