Unlike the easily studied neutral and ionized_____that compose the primary disk of the Milky Way itself, the components of the_____ surrounding our galaxy have proved more resistant to study.
Blank(i) Blank(ii)
A.materials
B.calculations
C.figments
D.fluctuations
E.region
F.problems
Blank(i) Blank(ii)
A.materials
B.calculations
C.figments
D.fluctuations
E.region
F.problems
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