单项选择题

[A] pieces [C] parts
[B] units [D] elements

A．pieces
B．units
C．parts
D．elements
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单项选择题
[A] across [C] from[B] to [D] through
A．across
B．to
C．from
D．through
单项选择题
[A] for [C] on[B] with [D] as
A．with
B．for [C] on
C．as
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