检查软件产品是否符合需求定义的过程称为( )。
A．确认测试
B．集成测试
C．验证测试
D．验收测试
参考答案：A
— —Thanks, Dad![ ]
A. Dinner ready.
B. Dinner is ready.
We read the newspaper ____________ suddenly the light went out. [ ]
A. when
B. while
C. before
D. after
