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绘图题：画出自耦变压器零序差动保护正确接线图，并注明一、二次极性。

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填空题

9个千、9个百和9个一组成的数是（    ）。
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单项选择题

A 3288. 5g baby boy is born by spontaneous vaginal delivery. During the initial assessment at 1 hour postpartum, the nurse notices lanugo, acrocyanosis, mongolian spots, and hemangiomas. Which of these is an abnormal finding in a neonate ？（）

A．Lanugo.

B．Acroeyanosis.

C．Mongolian spots.

D．Hemangiomas.
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