《全国土地利用总体规划纲要》中，严格控制非农建设占用耕地的表述，不正确的是( )。

近年来，人民币相对美元来说，一直处于强劲的升值状态。如果不考虑其他因素，人民币升值带来的影响有

① 中国出口的商品更具有竞争力       ② 中国从美国进口商品会更便宜

③ 中国居民到外国留学的费用降低     ④ 中国吸引外资的能力增强

A．①②

B．①③

C．②③

D．③④

从物权的变动来讲，物权法的基本原则包括（）。

A.公示原则

B.物品优先原则

C.公信原则

D.物权法定原则

E.保护性法律原则

Today my brother has to do his homework at home.  But if he ______ time, he would go hiking.    [ ]

A. has    

B. will have    

C. had    

D. have

Which of the following is NOT a recommended procedure for compliance with the Standards of Professional Conduct relating to misrepresentation The firm:（）

A. specifically designates which employees are authorized to speak on behalf of the firm.

B. discontinues using the work completed by a former member or candidate.

C. provides a written list of the firm's available services and a description of

the firm's qualification.

[说明] 建立一个分数类，使之具有下述功能：建立构造函数，它能防止分母为0，当分数不是最简形式时进行约分以及避免分母为负数。如

经过类Num(3,-6)的处理，转换为

；

经过类Num(8,10)的处理后，转换为

。 [C++代码] #include＜iostream.h＞ #include＜math.h＞ class Num { public: Num (int a,int b); private: int num1; int num2; }: Num:: Num (int a,int b) { if( (1) ) {cout＜＜"ERROR"＜＜endl;return; } int min=fabs(a)＜fabs (b)fabs (a): fabs (b); int x=1; for (int i=1;i＜=min;i++)if( (2) )x=i; a/=X; b/=x; if( (3) ) {a=-a;b=-b; } (4) (5) }