在我国，食品卫生标准一般由（）统一制定。
A．卫生部
B．轻工部
C．农业部
D．商业部
参考答案：A
__________the burglar from the second floor when the house owner found him stealing last night.
A．Down jumping
B．Down jumped
C．Jumping down
D．Jumped down
纤维的径向迁移
