简述为人讲诚信，必须做到什么？
参考答案：
一是都上级不欺骗敢讲真话，敢报实情，即报喜又报忧。
二是对同级不哄骗，以诚相处。
三是对下级不蒙骗，以诚相待。
The poor boy seems _____ the news that his father died in the car accident for there is no sign of sorrow on his face.
A．not to be known
B．not to have received
C．to have not received
D．not to know
用阴阳学说来说明人体的组织结构，肾的属性是（）。
A.藏元阳为阳脏
B.阳中之阳脏
C.阳中之阴脏
D.阴中之阳脏
E.阴中之阴脏
