Remote administration types are an example of one kind of (71) malicious software, the Trojan horse, or more simply Trojan. The purpose of these programs isn’t replication, (72) to penetrate and control. That masquerade as one thing when in fact they are something else, usually something destructive. There are a number of kinds of Trojans, including spybots, (73) report on the Web sites a computer user visits, and keybots or keyloggers, which record and report the user’s keystrokes in order to discover passwords and other confidential information.

RATS attempt to give a remote intruder administrative control of an infected computer. They work as (74) pairs. The server resides on the infected machine, while the client resides elsewhere, across the network, where it’s available to a remote intruder. Using standard TCP/IP or UDP protocols, the client sends instructions to the server. The server does (75) it’s told to do on the infected computer.

（71）处填（）。

A．nonviral

B．unviral

C．inviral

D．abviral

患者男性，44岁，因“反复发作右肾绞痛1年”就诊。患者2年来常进食肉类，尤其是动物内脏，曾反复出现趾关节红、肿、热、痛等症状。泌尿系统X线平片检查末见异常。

对于该患者，下列哪几种药物对预防结石的复发有临床作用（）

A.复方α-酮酸片（开同）

B.丙磺舒

C.氯化铵

D.碳酸氢钠

E.枸橼酸钾

F.螺内酯（安体舒通）

G.别嘌醇