单项选择题

The plumb line is always perpendicular ______ the horizontal plane.

A. with
B. from
C. at
D. to
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单项选择题
Most of modem young ladies care little about the ______ formalities which they think are out of fashion.
A. trivial
B. delicate
C. minor
D. miniature
单项选择题
A free lookout ______ the hills with binoculars.
A. scanned
B. scrutinized
C. explored
D. swept
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