_ Rotary vacuum pumps can reduce the absolute pressure to as low as __

1.	_ Rotary vacuum pumps can reduce the absolute pressure to as low as __________ mm Hg.$?
A.	1
B.	0.1
C.	0.01
D.	0.001
Answer» D. 0.001

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_ Rotary vacuum pumps can reduce the absolute pressure to as low as __________ mm Hg.$?

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