刘某，女，41岁。1999年3月21日就诊。主诉：腹胀痛、便秘1个月，患者发病的1个

已知实数a、b、c，则“ac=bc”是“a=b”的（　　）

A．充分非必要条件

B．必要非充分条件

C．充要条件

D．既非充分又非必要条件

课文填空（共9小题；每小题1分，满分9分）

_____小题1:______ a calculating machine, I could__小题2:______ difficult sums. I developed slowly for hundreds of years until I was made to work as a “universal machine”. From then on, I grew ____小题3:______  both in___小题4:______ and in brainpower .Then as my memory improved, I changed my ____小题5:_______ to a much smaller one. But I have to stand there by myself, feeling so ______小题6:_____ . Since the 1970s, many new applications _____小题7:______ (find) for me and I have become very important in communication, finance and trade. To provide humans with a life of high___小题8:_____ is what I am all about. I am really proud that I am a_____小题9:_____  friend and helper of the human race.

女性，33岁，曾有尿路感染病史。来院查尿常规为1～3个红细胞／HP，8～10个白细胞／HP

尿培养最不可能出现的结果是()

A.埃希大肠杆菌 

B.克雷伯杆菌 

C.支原体 

D.金黄色葡萄球菌 

E.无细菌生长

患者胆胃不和，虚烦不眠，或呕吐呃逆，甚或惊悸不宁。治疗应首选

A．温胆汤
B．归脾汤
C．酸枣仁汤
D．朱砂安神丸
E．天王补心丹

大多数慢性肾衰竭患者高血压的主要原因是（）

A.血管紧张素工增高

B.血管紧张素Ⅱ增高

C.肾素水平增高

D.水钠潴留

E.高磷血症