If the salinity(含盐量)of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation-conversion of liquid water to water vapour. In this manner,the salinity is increased, since the salts stay behind. If this is carried to the extreme,of course, white crystals of salt would be left behind; this, by the way,is how much of the table salt we use is actually obtained

asic life support(BLS)includes recognition of signs of means that in the first minutes after collapse the victims sudden cardiac arrest(SCA), heart attack, stroke, and chance of survival is in the hands of bystander foreign-body airway obstruction(FBAO); cardiopulmonary Shortening the EMS response interval increases survival resuscitation (CPR); and d

一、两类数据控件 二、数据连接控件 三、用于连接数据库

一、文件系统控件 1 驱动器列表框 DriveListBox 2 目录列表框 DirListBox 3 文件列表框 FileListBox 二、文件处理语句 三、文件系统对象 FileSystemObject(FSO) 四、传统的文件I/O语句

一、公共对话框 二、自制对话框

一、子程序(Sub过程) 二、函数(Function过程) 三、参数传递 四、过程的嵌套调用和递归调用 五、鼠标和键盘事件

一、利用控件输入、输出 二、文本框的Text属性,V/O 三、标签的 Caption属性, Output 四、对话框

7.1 Basic concepts on soft-switching 7.2 Classification of soft-switching- techniques 7.3 Typical soft-switching circuits and techniques

Basic Probability Concepts: Sample Spaces and Events, Simple Probability, and Joint Probability(联合概率) Conditional Probability(条件概率) Bayesian Theorem(贝叶斯定理) .The Probability of a Discrete Random Variable .Binomial, Poisson, and Hypergeometric Distributions Covariance(协方差) and its Applications in Finance

6.1 Basic principles 6.2 Some major PWM techniques in DC/AC inverters 6.3 PWM techniques with feedback control 6.4 PWM rectifiers