We go to the theatre _______ Saturday or Sunday. [ ]
A. in
B. on
C. at
D. with
答案:B
妊娠期腹部扪诊下列哪一项是错误的()
A.妊娠三个月以内可通过内诊检查
B.妊娠四个月后才可在小腹部扪及子宫
C.妊娠五六个月时宫底平脐
D.妊娠足七个月时宫底在脐上三横指
E.九个月至足月时宫底在剑突下二横指
登高焊割作业时,一般认为在地面周围()米范围内为危险区。
A.3
B.5
C.10
D.20