单项选择题

All parts of this sewing machine are ______ so that it is very simple to get replacements for them.

A．maximized
B．minimized
C．optimized
D．standardized
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单项选择题
Though they disagreed on details, they were in ______ agreement over the plan.
A．substantial
B．steady
C．stable
D．sticky
单项选择题
There isn't sound proof to support his biological theory.
A．financing
B．publications
C．evidence
D．appreciation
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