单项选择题

A．An auto mechanic.
B．An electrician.
C．A carpenter.
D．A telephone repairman.
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单项选择题
Which fact can prove what Newton proposed was right
A．The departing ships seemed to be smaller and smaller when they sailed away.
B．The greater a concentration of mass is at the poles, the stronger its gravitational pull.
C．The length from Earth’’s center to sea level at the equator is longer than that at the poles.
D．The changes in the rising of a few millimeters on Earth’’s surface detected by modern devices.
单项选择题
The word underscore in the last sentence of the text probably means ______ .
A．underestimate
B．ignore
C．emphasize
D．accelerate
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