题目内容
（请给出正确答案）
提问人：网友chjiwa
发布时间：2022-01-07
[主观题]
The author's purpose of writing this passage is to ______.A．describe the characteristics o
The author's purpose of writing this passage is to ______.
A．describe the characteristics of the advertisements in early days
B．persuade people to pay attention to the importance of visual images in advertising
C．tell people the development and role of American advertising
D．explain how to sell goods by advertisements nowadays
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. And the initial state of the system includes 
. Then the zero-input response of the system 
is ( ).
One’s of the world is greatly influenced by his social status and educational background.
