单项选择题 有如下C语言程序 void * th_f(void * arg) { printf('Hello World'); pthread_yield(0); } int main(void) { pthread_t tid; int st; st = pthread_create(&tid, NULL, th_f, NULL); if(st==0) printf('Oops, I can not createthread/n'); exit(NULL); } 针对上述程序，下列叙述中哪一个是正确的？

未知题型 A．He couldn't hold back the secret.B．He couldn't help the woman at all.C．He couldn't possibly tell the boss.D．He couldn't decide who told the boss.

单项选择题 在延期付款的大型设备交易中，采用“福费廷'融资，风险的最后承担者是( )。