一名合格的房地产估价师应具备( )。 A．扎实的估价理论知识 B．良好的社会关系

红细胞渗透脆性

— Were you at home at 8:00 last night? I called you but nobody answered.

— Sorry, I           a nap at that time.

A．take

B．took

C．was taking

D．am taking

某一封闭式办公大楼，终日采用集中式空调系统，近日工作人员诉说呼吸道干燥、鼻塞、头痛、注意力不集中、易疲劳等，但下班后返回家中，上述症状自行消失。此病症最可能是（）

A.与建筑物有关的疾病（BRI）

B.不良建筑综合征（SBS）

C.电脑综合征

D.C0₂中毒

E.流行性感冒

单折子系统凭证挂失，下列哪些说法是正确的()。

A、口头挂失可以跨网点办理，挂失期为5天

B、正式（书面）挂失必须到开户网点办理，挂失期为7天

C、密码挂失必须在开户网点办理，挂失期为3天

D、挂失补发必须由存款人本人到原挂失网点办理

/*simple ping program*/ struct sockaddr_in saddr; int rawsock; unsigned short in_cksum(unsigned short*addr, int len) { int sum=0; unsigned short res=0; while(1en＞1){ sum+=*addr++; len-=2;} if(len=1){ *((unsigned char *)(&res))=*((unsigned char *)addr); sum+=res; } sum=(sum＞＞16)+(sam & 0xffff); sum+=(sum＞＞16); res=～sum; return res; } void ping(int signo) { int len; int i; static unsigned short seq=0; char buff[8192]; struct timeval tv; struet icmp*icmph=(struct icmp * )buff; long*data=(long*)icmph→icmp_data; bzero(buff, 8192); gettimeofday(&tv, NULL); icmph→icmp_type=ICMP_ECHO; icmph→icmp_code=0; icmph→icmp_cksum=0; icmph→icmp_id=0; icmph→icmp_seq=0; icmph→icmp_id=getpid()&0xffff; icmph→icmp_seq=seq++; data[0]=tv.tv_sec; data[1]=tv.tv_usec; for(i=8; i＜ ; i++) icmph→icmp_data[i]=(unsigned char)i; icmph→icmp_cksum=in_cksum((unsigned short *)buff, 72); len; sendto(rawsock, buff, 72, 0, &saddr, sizeof(saddr)); alarm(1); } void sigint(int signo) { printf("CATCH SIGINT !!! \n"); close(rawsock); exit(0); } void dumppkt(char*buf, int len) { struct ip*iph=(struct ip*)buf; int i=iph→ip_h1*4; struct icmp*icmph=(struct icmp*)&buf[i]; long*data=(long*)iemph→icmp_data; struct timeval tv; gettimeofday(&tv, NULL); if(icmph→icmp_type! =ICMP_ECHOREPLY) return; if(icmph→icmp_id! =(getpid()&0xffff)) return; printf("From %s:ttl=% d seq=% d time=%.2f ms\n", inet_ntoa(iph→ip_src)，iph→ip_ttl, icmph→icmp_seq, (tv.tv_see-data[0])*1000.0+(tv.tv_usec-data[0])/1000.0)； } int main(int argc, char*argv[]) { int len; stuct timeval now; char recvbuff[8192]; if(1){ printf("%s aaa.bbb.ccc.ddd\n", argv[0]); exit(1); } rawsock=soeket(AF_INET, (2), IPPROTO_ICMP); if(rawsock＜0) { perror("soeket"); exit(1); } bzero ( &saddr, sizeof(saddr)); saddr.sin_family=(3); if( inet_aton( argv[1], &saddr.sin_addr) ＜0) { printf("invalid IP address: %s\n", argv[1]); exit(1); } signal(SICALRM, ping); signal(SICINT, sigint); alarm(1); while (1){ len=read (4), recvbuff, 8192); if( len＜0 && errno=EINTR) continue; else it( len＜0) perror("read"); else if( len＞0) dumppkt(recvbuff, len); } close (5); exit(0); }