虹吸滤池处理水量为15900m³/d，滤池格数为6格，设计滤速9m/h，则最大反冲洗强度为（）。

A．14.2L/(s·m²)

B．15.0L/(s·m²)

C．15.8L/(s·m²)

D．16.7L/(s·m²)

The problem is my weight. I’m just 1.57 meters high, but 61. ______
my weight is 75 kilos. Many students often make a fun 62. ______
of me. Some boys were unfriendly for me—they call63. ______
me "meat ball". That makes me to feel unhappy. 64. ______
Although I’m a bit too fat, yet I feel very well. I65. ______
enjoy my meal. I love eating meat very much. And I like 66. ______
sweet food, though. I often have sugar with tea, milk. In 67. ______
the past two months I had put on 5 kilos. So I’m becoming 68. ______
more and more worried this problem, but I don’t 69. ______
know to lose weight quickly. Could you help me, dear doctor 70. ______