牛乳喂养儿，大便的特点是（）
A．风气内动
B．寒从中生
C．湿浊内生
D．津伤化燥
E．火热内生
参考答案：B
—I'm really sorry that I have kept you me so long.
— _____. [ ]
A. waiting, No matter
B. waiting for, It doesn't matter
C. to wait, Never mind
D. to wait for, It doesn't matter
76403520是一个______位数，“6”在______位上，它的计数单位是______．
