Einstein’s Theory of Relativity was so __________that few people could understand it at that time. 
#18371
A
controversial
B
religious
C
abstract
D
contradictory
推荐题目
Glasses are       __and must be handled with great care.
#19324
A
abundant
B
diverse
C
extinct
D
fragile
One of the suspects is _________ schoolboy.
#34937
A
a 18-year-old
B
an 18-years-old
C
a 18 years old
D
an 18-year-old