The chart above shows how Jeff spent his earnings for one year. How much did Jeff spend for clothing ？（）
(1)He spent $18 during the year on tennis balls.
(2)He spent $190 during the year on recreation

A．条件(1)充分，但条件(2)不充分．

B．条件(2)充分，但条件(1)不充分．

C．条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．

D．条件(1)充分，条件(2)也充分．

E．条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．

滤池的冲洗强度是指单位滤池面积所需的冲洗水流量，以（）表示。

A.L/s*m

B.L/s*m2

C.L/s*m3

D..L*s/m