Blessed are the young, for they shall inherit the national debt Herbert hoover When a government spends more than it collects in taxes, it borrows from the private sector to finance the budget deficit. The accumulation of past borrowin is the government debt. Debate about the appropriate amount of government debt in the United States is as old as the country itself. Alexander Hamilton be- lieved thata national debt, if it is not excessive, will be to us a national blessing, whereas James Madison argued that \a public debt is a public curse \Indeed, the location of the nations capital was chosen as part of a deal in which the federal

Plate Tectonics From Hypothesis to Theory Plate tectonics is a scientific theory that explains two centuries of often puzzling observations and hypotheses a bout our planet Earth. a The continents are drifting very slowl across the face of our planet Continental drift is a concept with a long history

Ikenes are hydrocarbons that contain a carbon-carbon double bond. A car- bon-carbon double bond is both an important structural unit and an important functional group in organic chemistry. The shape of an organic molecule is influ- enced by the presence of this bond, and the double bond is the site of most of the chem- ical reactions that alkenes undergo. Some representative alkenes include isobutylene(an industrial chemical), a-pinene (a fragrant liquid obtained from pine trees), and farnesene (a naturally occurring alkene with three double bonds

ot all the properties of alkenes are revealed by focusing exclusively on the func- tional group behavior of the double bond. A double bond can affect the proper- ties of a second functional unit to which it is directly attached. It can be a sub- stituent, for example, on a positively charged carbon in an allylic carbocation, or on a carbon that bears an unpaired electron in an allylic free radical, or it can

Absolute configuration(Section 7.5): The three-dimensional Activating substituent (Sections 12.10 and 12.12): A group rrangement of atoms or groups at a stereogenic center. that when present in place of a hydrogen causes a particular Acetal(Section 17.8): Product of the reaction of an aldehyde or reaction to occur faster. Term is most often applied to a ketone with two moles of an alcohol according to the substituents that increase the rate of electrophilic aromatic

1、书写标识符时,忽略了大小写字母的区别。 编译程序把a和A认为是两个不同的变量名,而显示出错信息。C认为大写字母和小写字母是两个不同的字符。习惯上,符号常量名用大写,变量名用小写表示,以增加可读性 。 2、忽略了变量的类型,进行了不合法的运算。 printf(\%d\, a%b) 是求余运算,得到a/b的整余数。整型变量a和b可以进行求余运算,而实型变量则不允许进行「求 余」运算 。 3、将字符常量与字符串常量混淆。 在这里就混淆了字符常量与字符串常量,字符常量是由一对单引号括起来的单个字符,字符串常量是一对 双引号括起来的字符序列

The question of whether a govemment can go bankrupt in the Netherlands is not a new one. The Supreme Court, for example, was asked as early as 1922 whether a municipality(in this case, Wormerveer)could be decared bankrupt. Through the appeal in cassation, the court did not reach a principled verdict in this matter. Ever since, it has remained a vexed question that regularly kept rearing its head, both in the literature and in case-law. There were

设矩阵A∈Rn,如果存在数入∈C及非零向量x∈C满足方程 Ax∈x,则称λ为矩阵A的一个特征值,称为矩阵A的相应于特 征值λ的特征向量。为简单起见,下称,x为矩阵A的一特征对。 特征值的计算,直接从特征方程()=det-A)=0出发会遇到很 大困难,当n稍大一些,行列式展开本身就很不容易,随后是高次代数 方程求解。因此,矩阵特征值的求解,主要是数值解法

P121.6 maino fint a, b, c, m; 输入a,b,c scanf(\%d, %d, %d,, &a, &b, &c) if(a>b)m=a else m=b