In the bubble years, lending standards slipped ______,allowing   many people to put far too much of their income into paying for their housing.

A．delicately

B．dynamically

C．deliberately

D．dramatically

精神发育迟滞患者伴有精神病性症状的有（）

A.10%～20%

B.21%～40%

C.41%-60%

D.61%～70%

E.71%～80%