_____ by a black hole, Li Yanping was so frightened at first, but he calmed down later and

tried his best to escape.

A．Caught

B．Catching

C．To catch

D．Catch

某研究人员将统计资料按研究指标的类型整理实验数据，以下属计量资料的是（）。

A.尿蛋白定性情况

B.白细胞数

C.就诊人数

D.住院天数

E.住院率