The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.
A. what
B. which
C. that
D. though
第1题:
A. curious
B. funny
C. hard
D. worried
第2题:
A. many - to - one
B. one - to - one
C. one - to - many
D. many - to - many
第3题:
第4题:
A.Has-arelationshipsshouldneverbeencapsulated.
B.Has-arelationshipsshouldbeimplementedusinginheritance.
C.Has-arelationshipscanbeimplementedusinginstancevariables.
D.Is-arelationshipscanbeimplementedusingtheextendskeyword.
E.Is-arelationshipscanbeimplementedusingtheimplementskeyword.
F.Anarrayoracollectioncanbeusedtoimplementaone-to-manyhas-arelationship.
G.TherelationshipbetweenMovieandActressisanexampleofanis-arelationship.
第5题:
第6题: