Atoms that (having) different atomic (numbers) generally (behave) (differently).（）

单项选择题To (people) from the northern parts of the country, (tropical) butterflies (may) seem (incredible) big.（）

A.people
B.tropical
C.may
D.incredible

单项选择题(New uses) for plastics (were found) during (the) 1950’s and 1960’s in medicine, space, research, (industrial), and architecture.（）

A.New uses
B.were found
C.the
D.industrial