题目内容

以下关于事务的说法错误的是______。

A. 事务是构成数据库应用中一个独立逻辑工作单元的操作的集合
B. 事务是访问并可能更新数据库中各种数据项的一个程序执行单元
C. 事务以begin-transaction语句开始
D. 事务都是以commit语句结束

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以下关于死锁检测与恢复叙述错误的是______。

A. 死锁检测用来定期检查系统是否发生死锁
B. 死锁恢复用于将系统从死锁中解救出来
C. 有效的方法是从后向前REDO这个事务的部分操作,只要能够解开系统死锁即可
D. 为了防止某些事务总被选做被撤销事务,可以限定每个事务被选为撤销事务的次数

It has been justly said that while "we speak with our vocal organs we 1 with our whole bodies. " All of us communicate with one another 2 , as well as with words. Sometimes we know what we"re doing, as with the use of gestures such as the thumbs-up sign to indicate that we 3 . But most of the time we"re not aware that we"re doing it. We gesture with eyebrows or a hand, meet someone else"s eyes and 4 . These actions we 5 are random and incidental. But researchers 6 that there is a system of them almost as consistent and comprehensible as language, and they conclude that there is a whole 7 of body language, 8 the way we move, the gestures we employ, the posture we adopt, the facial expression we 9 , the extent to which we touch and distance we stand 10 each other.Body language serves a variety of purposes. Firstly it can replace verbal communication, 11 with the use of gesture. Secondly it can modify verbal communication. Loudness and 12 of voice is an example here. Thirdly it regulates social interaction: turn taking is largely governed by non-verbal 13 . Fourthly it conveys our emotions and attitude. This is 14 important for successful cross-cultural communication.Every culture has its own body language, and children absorb its nuances 15 with spoken language. The way an Englishman crosses his legs is 16 like the way a male American does it. When we communicate with people from other cultures, the body language sometimes help make the communication easy and 17 , such as shaking hand is such a 18 gesture that people all over the world know that it is a signal for greeting. But sometimes the body language can cause certain misunderstanding 19 people of different cultures often have different forms of behavior for sending the same message or have different 20 towards the same body signals.

A. interpretations
B. implicative
C. understanding
D. implications

It has been justly said that while "we speak with our vocal organs we 1 with our whole bodies. " All of us communicate with one another 2 , as well as with words. Sometimes we know what we"re doing, as with the use of gestures such as the thumbs-up sign to indicate that we 3 . But most of the time we"re not aware that we"re doing it. We gesture with eyebrows or a hand, meet someone else"s eyes and 4 . These actions we 5 are random and incidental. But researchers 6 that there is a system of them almost as consistent and comprehensible as language, and they conclude that there is a whole 7 of body language, 8 the way we move, the gestures we employ, the posture we adopt, the facial expression we 9 , the extent to which we touch and distance we stand 10 each other.Body language serves a variety of purposes. Firstly it can replace verbal communication, 11 with the use of gesture. Secondly it can modify verbal communication. Loudness and 12 of voice is an example here. Thirdly it regulates social interaction: turn taking is largely governed by non-verbal 13 . Fourthly it conveys our emotions and attitude. This is 14 important for successful cross-cultural communication.Every culture has its own body language, and children absorb its nuances 15 with spoken language. The way an Englishman crosses his legs is 16 like the way a male American does it. When we communicate with people from other cultures, the body language sometimes help make the communication easy and 17 , such as shaking hand is such a 18 gesture that people all over the world know that it is a signal for greeting. But sometimes the body language can cause certain misunderstanding 19 people of different cultures often have different forms of behavior for sending the same message or have different 20 towards the same body signals.

A. also
B. along
C. besides
D. alone

It has been justly said that while "we speak with our vocal organs we 1 with our whole bodies. " All of us communicate with one another 2 , as well as with words. Sometimes we know what we"re doing, as with the use of gestures such as the thumbs-up sign to indicate that we 3 . But most of the time we"re not aware that we"re doing it. We gesture with eyebrows or a hand, meet someone else"s eyes and 4 . These actions we 5 are random and incidental. But researchers 6 that there is a system of them almost as consistent and comprehensible as language, and they conclude that there is a whole 7 of body language, 8 the way we move, the gestures we employ, the posture we adopt, the facial expression we 9 , the extent to which we touch and distance we stand 10 each other.Body language serves a variety of purposes. Firstly it can replace verbal communication, 11 with the use of gesture. Secondly it can modify verbal communication. Loudness and 12 of voice is an example here. Thirdly it regulates social interaction: turn taking is largely governed by non-verbal 13 . Fourthly it conveys our emotions and attitude. This is 14 important for successful cross-cultural communication.Every culture has its own body language, and children absorb its nuances 15 with spoken language. The way an Englishman crosses his legs is 16 like the way a male American does it. When we communicate with people from other cultures, the body language sometimes help make the communication easy and 17 , such as shaking hand is such a 18 gesture that people all over the world know that it is a signal for greeting. But sometimes the body language can cause certain misunderstanding 19 people of different cultures often have different forms of behavior for sending the same message or have different 20 towards the same body signals.

A. unusual
B. unique
C. ordinary
D. universal

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