Astronauts in space can't stand at one place, because

1.	Astronauts in space can't stand at one place, because
A.	there is no gravity
B.	viscous forces of the atmosphere are vary strong
C.	solar wind exert an upward force
D.	atmospheric pressure is very low
Answer» B. viscous forces of the atmosphere are vary strong

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Astronauts in space can't stand at one place, because

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