幽默式广告表现需要从目标受众的（）以及（）入手，去寻找最能引起特定受众群体（）的幽默内容，而且针对目标受众设定幽默的（）非常重要。
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Refer to the exhibit.HostA cannot ping HostB.Assuming routing is properly configured,what could be the cause of this problem?（）
A. HostA is not on the same subnet as its default gateway
B. The address of SwitchA is a subnet address
C. The Fa0/0 interface on RouterA is on a subnet that cannot be used
D. The serial interfaces of the routers are not on the same subnet
E. The Fa0/0 interface on RouterB is using a broadcast addre
洗涤塔系统主要洗涤气体中的（），回收有利用价值的物质，达到净化气体、防止污染环境的目的。
A. 氮气
B. 有机物、可溶解洗液中的气体等
C. 氢气
D. 一氧化碳
弹性体改性沥青防水卷材热老化试验在加热处理（）后，取出试件在标准试验条件下放置（）。
A. 10d±1h；3h±5min
B. 10d±1h；2h±5min
C. 10d±2h；3h±5min
D. 10d±2h；2h±5mi
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