单项选择题

The glass vessels should be handled most carefully since they are （）

A．intricate
B．fragile
C．subtle
D．crisp

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单项选择题

She had recently left a job and had helped herself to copies of the company's client data, which she intended to （）in starting her own business.

A．dwell on
B．come upon
C．base on
D．draw upon

单项选择题

How much of your country's electrical supply is （）from water power

A．deduced
B．detached
C．derived
D．declined

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