It’s raining heavily. We have to         the picnic.

A．put off

B．join in

C．hold on

D．take part in

急性肾炎病儿可正常上学的标准是（）

A.尿常规正常

B.尿阿迪氏计数正常

C.血压正常

D.血沉正常

E.抗"O"滴定度正常