下列会导致一过性视力丧失的疾病有
A.椎基底动脉供血不足
B.视网膜中央动脉痉挛
C.偏头痛
D.视神经炎
参考答案:A, B, C
执行以下程序后,test.txt文件的内容是(若文件能正常打开)______。#includemain() FILE *fp; char *s1="Fortran",*s2="Basic"; if((fp=fopen("test.txt","wb"))==NULL) printf("Can′t open test.txt file\n");exit(1); fwrite(s1,7,1,fp); /*把从地址s1开始的7个字符写到fp所指文件中*/ fseek(fp,0L,SEEK_SET); /*文件位置指针移到文件开头*/ fwrite(s2,5,1,fp); fclose(fp);
A.Basican
B.BasicFortran
C.Basic
D.FortranBasic