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随境转移主要见于（）
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与传统的网络操作系统相比，Linux操作系统主要的特点有( )。 Ⅰ．Linux操作系统限制应用程序可用内存的大小 Ⅱ．Linux操作系统具有虚拟内存的能力，可以利用硬盘来扩展内存 Ⅲ．Linux操作系统允许在同一时间内，运行多个应用程序 Ⅳ．Linux操作系统支持多用户，在同一时间内可以有多个用户使用主机 Ⅴ．Linux操作系统具有先进的网络能力，可以通过IPX协议与其他计算机连接，通过网络进行分布式处理 Ⅵ．Linux操作系统符合UNIX标准，但不可以将Linux上完成的程序移植到UNIX主机，上去运行
[说明] 现有一个事务集T1，T2，T3，T4，其中这4个事务在运行过程中需要读写表X、Y和Z。设Ti对x的读操作记作TiR(X)，Ti对X的写操作记作TiW(X)。 事务对XYZ的访问情况如下： T1:TIR(X) T2:T2R(Y)，T2W(X) T3:T3W(Y)，T3W(X)，T3W(Z) T4:T4R(Z)，T4W(X) 试述事务并发调度的正确性准则及其内容。
I’d like to talk to you today about an article that appeared in the Honolulu Advertiser. The article was concerned (31) something called nonverbal communication. This is a phenomenon that scientists are now studying. Nonverbal communication has to (32) with gestures, movements, and closeness of two people when they are talking. The scientists say that these gestures, movements, and so forth have meaning which the words (33) the people are using do not carry. For (34) , the physical distance between two speakers can be important. North Americans often complain that South Americans are being "pushy" (35) they tend to stand close to the North American when speaking, (36) the South American often considers the North American to be "cold" or "distant" because he keeps a greater (37) between himself and the person he is speaking to. In the Middle East, it’s considered seductive for a woman to allow a man (38) look her in the eye. This "eye contact" provides another example of what we’re calling (39) communication. A social psychologist has observed that there is more eye contact between people who like each other (40) there is between people who don’t like each other. The length of time that the person whom you are speaking to looks at your eyes indicates the amount of interest he has in you (41) than the amount of interest he has in the thing you are talking about. On the other (42) , too long a gaze can be embarrassing. Most people become uncomfortable when they’re stared (43) . The eyes apparently play a great (44) in nonverbal communication. Frequently looking (45) can indicated submissiveness, humility, or embarrassment, or even boredom (46) dislike. Genuine warmth or interest can often be seen in they eyes. One scientist suggests that pleasant, satisfying experiences (47) to make the pupils of the eyes grow larger. Sometimes when we feel that a person is being "warm" or "friendly" it is possible that we are reacting to a form of nonverbal communication — his opened pupils. We do not always consider a smile to be a sign of friendliness. Someone who is always (48) , and with little apparent reason, often makes us feel uneasy. Keep in mind what we’re said about nonverbal communication, and the next time you’re at a party try to notice which persons seem (49) draw close together when speaking — which persons seem to try to stay further apart or even to avoid-each other. You may find this silent language, (50) we’ve called nonverbal communication, very interesting and even fascinating.
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