能使蛋白质沉淀的试剂是 [ ]
A．浓盐酸
B．硫酸铵溶液
C．浓氢氧化钠溶液
D．生理盐水
E．以上都不是
答案：B
(2013·高考安徽卷)I________ to my cousin’s birthday party last night，but I was not available.
A．went
B．had gone
C．would go
D．would have gone
精神损害是指什么？
