contains+an+invalid+path

冶都文1915两道关于英语冠词的选择What I need is a book that contains - __ - ABC of oil painting.这里的空格填the,可是我认为不是特指为什么不能用零冠词?还是说... -
蒯单媚15363355477 ______[答案] 冠词的固定搭配.the ABC of意思是“……的入门指南;……的基础” 这里答案应该是“the”,填a肯定不对! the/a都可以用于单数可数名词前表类别. 区别是:the表类别强调类别的整体,a/an表类别强调类别中的每一个. 如:A horse is a useful ...

冶都文1915在数列{an}中,a1=2,a2=5,an+2 - 3an+1+2an=0,则an=? -
蒯单媚15363355477 ______ 由an+2-3an+1+2an=0,得an+2-an+1=2(an+1-an) 所以{an+1-an}是等比数列,即 an+1-an=(a2-a1)•2n-1=3•2n-1 再注意到a2-a1=3,a3-a2=3•21,a4-a3=3•22,…,an-an-1=3•2n-2,这些等式相加,即可以得到an=3(2^n-1-1) 我想,答案应该没错~~^_^

冶都文1915C++ acm的一个题目 Sample Input 3 4 1 2 3 4 5 1 2 3 4 5 3 1 2 3 Sample Output 10 15 6InputInput contains an integer N in the first line,and then N lines follow.... -
蒯单媚15363355477 ______[答案] #include int main() { int a,sum,n,j,l; scanf(＂%d＂,&l); for(j=1;j

冶都文19153dsmax工具栏的六个按钮是什么?? -
蒯单媚15363355477 ______ 1 Create panel Contains controls for creating objects: geometry, cameras, lights, and so on. 2 Modify panel Contains controls for applying modifiers to objects and editing editable objects such as meshes and patches. 3 Hierarchy panel Contains ...

冶都文1915sql中contains和freetext语句的区别?能否举个例子? -
蒯单媚15363355477 ______ SQL Server 2000提供的全文检索语句主要有CONTAINS和FREETEXT.CONTAINS语句的功能是在表的所有列或指定列中搜索:一个字或短语;一个字或短语的前缀;与一个字相近的另一个字;一个字的派生字;一个重复出现的字. ...

冶都文1915设数列a1,a2,a3...,an,...中的每一项都不为0.证明:{an}为等差数列的充分必要条件是:对任何n属于N,都有1/a1*a2+1/a2*a3+...1/an*an+
蒯单媚15363355477 ______ 必要性很容易证明:将an=(n-1)d+a1带入上式即可. 充分性: 1/a1*a2+1/a2*a3+... 1/a(n-1)*an+1/an*an+1=n/a1*an+1............1 1/a1*a2+1/a2*a3+...1/a(n-1)*an=(n-1)/a1*an........2 1-2得: a1=nan-(n-1)an+1 同理: a1=(n-1)-(n-2)an 所以 2(n-1)an=(n-1)an-1 +an+1 即 2an=an-1+an+1 所以必要性也成立 即命题成立 证毕.

冶都文1915x=1:10:6; y=2+sin(2*x^0.5); z=trapz(x,y) Error using ==> permute ORDER contains an invalid怎么回事
蒯单媚15363355477 ______ x=1:10:6; y=2+sin(2*x^0.5); z=trapz(x,y) Error using ==> permute ORDER contains an invalid x=1:10:6 有问题吧 你的步长是10,比6还大

冶都文1915关于电子排布的一道AP化学题Consider an atom that contains an electron with the quantum numbers 3,1,0, - 1/2,All that can be said about this electron is that it ... -
蒯单媚15363355477 ______[答案] n=3啊,当然是第从第三周期开始了.第三周期第一个是钠~你说的21是第四周期的了

冶都文1915英语专业四级考前恶补 - 语法词汇有哪些?
蒯单媚15363355477 ______ Test One 集体名词作主语主谓一致 1)通常作复数的集体名词ؤ 集体名词,如:... The back garden of our house contains a lawn, ة______ت very pleasant to sit on in summer...