The nurse is assessing a client with an ileal conduit. She notes that the client's urinary appliance contains pale yellow urine with large amounts of mucus. How would the nurse best interpret these data

A．These findings are normal for the client.

B．There is irritation of the stoma.

C．The client is developing an infection of the urinary tract.

D．The mucus is caused by elevated levels of glucose in the urine.

试列出图3—21所示系统实现“快进—Ⅰ工进—Ⅱ工进—快退—停止”工作循环的电磁铁动作顺序表（电磁铁通电记“+”号，断电记“—”号）。