二尖瓣狭窄最常见的病因
A.炎症
B.黏液样变性
C.退行性改变
D.缺血性坏死
E.创伤
参考答案:A
—______ is the ruler? —______ two dollars.
A.How much;It is
B.How much;They are
C.How many;They are
D.How many;It’s
若要求定义具有10个int型元素的一维数组a,则以下定义语句中错误的是
A.#define N 10 int a;
B.#define n 5 int a[2*n];
C.int a[5+5];
D.int n=10,a;