Which statement is right according to the passage
A. We don' t need person - to - person selling any more.
B. Since the Industrial Revolution, person -to -person selling disappeared.
C. Advertising pays for about two thirds of the cost of the programs on commercial television and radio.
D. Advertise on commerical television and radio is more expensive than on magazines and newspapers.
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在对强夯施工后的石质路基的表层松动时，采用( )进行压实。
A. 倾填
B. 振动碾压法
C. 横向压实法
D. 竖向填筑法
当路堤原地基横坡陡于1:5时，原地基应挖成台阶，台阶宽度一般不小于( )m。
A. 0.8
B. 1.0
C. 1.2
D. 1.4
From the last sentence of the second paragraph we learn ______.
A. advertising is no different from person -to- person selling in substance
B. advertising extends sales promotion to a larger area
C. advertising has greatly improved the production of goods
D. it is very expansive to advertise a new product
以下哪个不是SNMP网络管理的工作方式( )
A. 轮询方式
B. 中断方式
C. 基于轮询的中断方式
D. 陷入制导轮询方式
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