【单选题】
下述程序的运行结果( )。
#includevoid main()
{
int x=1,a=0,b=0;
switch(x)
{
case 0:b++;
case 1:a++;
case 2:a++;b++;
}
printf(a=%d,b=%d\n,a,b);
}
case 1:a++;
case 2:a++;b++;
}
printf(a=%d,b=%d\n,a,b);
}
【单选题】
In language studies, linguists may investigate the history and stages of language change in a course of time. This is called _______ approach.It is historical lexicology.