题目内容

Many migrant workers who leave their children behind in the countryside ______ about having failed to perform their role as parents. (guilt)

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When Mom ______ of their marriage, she couldn't help wondering how they had managed on with so little money then. (look back on)

线程是进程的另一种称呼。

A. 对
B. 错

一个进程可以有多个线程，而且至少有一个可执行线程。

A. 对
B. 错

线程调度切换时的系统开销要比进程切换时小。

A. 对
B. 错