封闭式基金的规模在发行后未经法定程序认可，不能再增加发行。
参考答案：对
— These farmers have been to the United States.
— Really? When ______ there? [ ]
A. will they go
B. did they go
C. do they go
D. have they gone
触电伤害程度与哪些因素有关？
