【单选题】
When nurses go into the hospital ward, ______.
A.they answer a call with locator badges
B.the wireless system begins to function
C.staff can watch them through a wall unit
D.infrared signals can detect their presence
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根据网考网移动考试中心的统计,该试题:
1%的考友选择了A选项
39%的考友选择了B选项
1%的考友选择了C选项
59%的考友选择了D选项