The death number in Saturday night’s conflicts between protesters and security forces in Thailand is 19 __________ the number of the injured is 825.

A．before

B．after

C．when

D．while

()是生产过程中应控制的各种技术数据，是进行物料衡算、公用工程量计算和设备计算的重要依据。

A．物料参数

B．工艺参数

C．流程参数

D．定额