6个月女婴，因发热腹泻3天急诊入院。入院前2天突起发热，下午呕吐2次，继而排水样便5～6次，量少。次日热退，吐止，腹泻次数增至每天10次，尿量减少，神萎，前囟眼窝凹陷，泪少，咽充血，心肺阴性，皮肤弹性减退。

如第2天脱水纠正，大便减至3～4次／日，不吐，有尿，胃纳差。补液原则为（）

A.停静脉滴注，改用口服补液盐

B.补继续丢失量

C.补生理需要量+继续丢失量

D.补生理需要量

E.调整饮食，米汤喂养

检索选修4门以上课程的学生总成绩(不统计不及格的课程)，并要求按总成绩的降序排列出来。正确的SELECT语句是 Ａ) SELECT S#，SUM(GRADE)FROM SC WHEREGRADE＞=60 CROUP BY S# ORDER BY 2 DESC HAVING COUNT(*)＞=4 Ｂ) SELECT S#，SUM(GRADE)FROM SC WHERE GRADE＞=60 GROUP BY S# HAVING COUNT(*)＞=4 ORDER BY 2 DESC Ｃ) SELECT S#，SUM(GRADE)FROM SC WHERE GRADE＞=60 HAVINC COUNT(*)＞=4 GROUP BY S# ORDER BY 2 DESC Ｄ) DELECT S#，SUM(GRADE)FROM SC WHERE GRADE＞=60 ORDER BY 2 DESC CROUP BY S# HAVINC COUNT(*)＞=4