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问题 选择题
一根电阻丝，在通过2C的电量时，消耗的电能为8J，若在相同时间内通过4C的电量时，电阻器上所加的电压U和消耗的电能E各是（   ）

A．U=4V，E=16J

B．U=8V，E=16J

C．U=4V，E=32J

D．U=8V，E=32J

答案

答案：D

单项选择题

When developing a teaching plan for the mother of a child diagnosed with spastic cerebral palsy, which of the following descriptions would the nurse include

A. Wide-based gait and poor muscle coordination.
B. Tremors and lack of active movement.
C. Increased muscle tone and stretch reflexes.
D. Slow, wormlike writhing movements.
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单项选择题

火试是中药的鉴别特征之一，燃烧之，发出爆呜声且有闪光，无灰渣残留的是（）

A、麝香

B、海金砂

C、血竭

D、雄黄
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