若诊断为子痈,必须下列哪项支持:
A.透光试验阴性B.触诊睾丸肿大压痛明显C.血象白细胞增高D.透光试验阳性E.血象白细胞正常
参考答案:C
We should make full use of whatever happens to us.There is always____ to learn from every experience.
A.nothing
B.anything
C.something
D.everything
自感电动势的方向总是与电流方向相反的。