男性，56岁，肝硬化腹水患者。l周来发热，腹痛，体温38℃，脉搏100次／分，呼吸26次／分，踝部可凹性水肿，腹水检查：微黄色，微浑，比重：1.016，细胞数0.8×109／L，白细胞数0.5×109／L，分类：中性0.70，淋巴0.30。可能诊断是()

A.肝硬化顽固性腹水

B.肝硬化合并肝癌

C.肝硬化合并结核性腹膜炎

D.肝硬化合并自发性腹膜炎

E.肝肾综合征

In the following essay,each blank has four choices．Choose the best answer and writedown on the answer sheet．
Communicating via E—mail is by far the most common Internet activity．You can (71) with anyone in the world who has an Internet address or E—mail (72) with a systemconnection to the Intemet．All you need is (73) the Internet and an E—mail program．Two ofthe most widely used E．mail programs are Microsoft’s (74) and Netscape’S Navigator．Atypical E．mail message has three basic (75) ：header，message，and signature·

A．packets
B．elements
C．frames
D．cells