The early achievements in space exploration were all crash-landings, each spacecraft___（）
A. in destroy
B. destroying
C. being destroyed
D. having been destroying
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Please tell the function（s） of the underlined part（s） in each sentence.He found it astonishing how they could accomplish it（）
A. adverbial
B. real object
C. complement
D. formal object
Which of the underlined parts in the four sentences functions differently from the others（）
A. The problem appeared impossible
B. The soup tastes wonderful
C. My skin feels rough
D. I stared at the motionless animal
有如下类的定义：class sample { int n; public: sample （int i=0）:n（i）{ } void setValue（int n0）; }；下列关于setValue成员函数的实现中，正确的是（）
A. sample::setValue（int n0）{n=n0;}
B. void sample::setValue（int n0）{n=n0;}
C. void setValue（int n0）{n=n0;}
D. setValue（int n0）{n=n0;}
下列重载为非成员函数的运算符函数原型中，错误的____（）
A. Fraction operator -（Fraction）
B. Fraction& operator =（Fraction&, Fraction）
C. Fraction& operator +=（Fraction&, Fraction）
D. Fraction operator +（Fraction, Fraction）
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