单项选择题

局麻药毒性反应与下列有关的是（）

A.误入血管
B．注药部位血管丰富使药物吸收过快
C．药液浓度过高
D．局麻药中加入肾上腺素

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答案： so thatMultiprogramming increases CPU utilization by organiz...

单项选择题

A beam of white light is separated into beams of various colors, we conclude that white light is actually a mixture of light of these different colors.

A、from which
B、to which
C、at which
D、in which