知照性公告、通告
参考答案：这类公告、通告发布的目的，只是让群众或者有关人员知道，并不需要大家去遵守或者执行。
When I asked him _____ to the post office, he didn't seem to understand me. [ ]
A. how I can get
B. how can I get
C. how I could get
D. how could I get
细菌内毒素的主要毒性成分是( )
A．脂质A
B．非特异核心多糖
C．菌体特异性多糖
D．蛋白质
