（）是美国国家标准局公布的第一个数据加密标准，它的分组长度为（）位，密钥长度为（位。
参考答案：DES；64；56
The nurse is caring for a client with otosclerosis scheduled to undergo a stapedectomy. The client asks the nurse when her hearing will improve. Which response by the nurse is most appropriate ？（）
A．Your hearing may not improve but you'll no longer be bothered by tinnitus.
B．Your hearing may be dramatically improved right after surgery.
C．You may notice improved hearing within 1 to 2 weeks.
D．Your hearing may improve 3 to 6 weeks after surgery.
断面较平坦，粉性的药材为（）
A．香加皮
B．黄柏
C．厚朴
D．桑白皮
E．牡丹皮
