脘腹胀痛，嗳腐吞酸，恶食呕恶，痛而欲泻，泻后痛减，或大便秘结宜用（）
A.枳实导滞丸
B.小承气汤
C.大承气汤
D.枳术丸
E.保和丸
参考答案：A
从一堆苹果中任取5只，称得它们的质量分别为（单位：克）125、124、122、123、126，则该样本方差s2=______．
— Bob ____ with me to the airport.
— Really? What time to the airport? [ ]
A. is coming
B. comes
C. was coming
D. came
