朱砂能治疗心悸失眠，具有重镇安神之功，其归经为
A．归心经B．归肝经C．归脾经D．归肺经E．归肾经
参考答案：A
Father ____ that we four brothers try our best to help our uncle ___ everything he had done for us.
A．suggested; in return for
B．hoped; in exchange for
C．wished; in terms of
D．supposed; in turn
导体容易导电是因为导体中有 ______，绝缘体不容易导电，是因为绝缘体中 ______．
