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【简答题】
下面程序的输出结果是【 】。 include＜iostream.h＞ int add(int a, int b); void main() { extern int x, y; cout＜＜add(x, y)＜＜end1; } int x(20),y(5); int add(int a, int b) { int s=a+ b; return s; }
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举一反三
【单选题】Unit elastic demand means that the
A.
ratio of a change in the quantity demanded to a change in the price equals 1.
B.
ratio of a percentage change in the quantity demanded to a percentage change in the price equals 1.
C.
demand curve is vertical.
D.
demand curve is horizontal.
【简答题】According to Passage I of this unit, the smilie :-@ means ____________.
【简答题】According to Passage I of this unit, the smilie :-) means ____________.