进程与程序的本质区别是（）
A.顺序与非顺序执行机器指令
B.存储在内存和外存
C.分时使用与独占使用计算机资源
D.动态和静态特征
参考答案：D
解析：
解析：进程与程序的区别：进程是动态的，程序是静态的；进程是独立性 的，能并发执行，程序不能并发执行；程序与进程无一一对应关系；进程异步进行，会相互 制约，程序不具备此特征。而本质上的区别是进程是动态的，程序是静态的。
He is a 16-year-old boy. __1__name is Alan Brown. Alan is __2__ American high school student. He lives at __3__ Road. Art and music __4__ his favourite subjects. He loves studying and also loves sports. He usually goes swimming three or four times every week. And he walks after supper every _5__. Cool water and clean air always make him happy. American students are quite different from __6__. On Saturdays, he often has parties __7__ his friends and they always enjoy themselves. On Sundays, he usually __8__ at home and watches TV.
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