26．Though ____ to go to bed many times, the little boy just turned a deaf ear and fixed his eyes on the cartoons．

A．urging

B．being urged

C．urged

D．having urged

有关检测血清酶活力时，添加稀释水的说法正确的是（）

A.使用液体试剂盒时，因稀释水体积和试剂体积比易于计算，稀释水的体积可比使用干粉试剂盒时多加

B.添加样品稀释水的目的在于避免样品间交叉污染

C.添加试剂稀释水的目的在于保证反应总体积在测定范围

D.样品稀释水的量在复溶试剂时不必扣除

E.试剂稀释水的量在复溶试剂时必须扣除