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

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