题目内容

At he beginning of the 20thcentury,Chinaisthe world’s largest advertising country.

A. 对
B. 错

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Inthe late 19thcentury,there exists asmallgap between China and America.

A. 对
B. 错

Isawtheincidentfrombeginningtoend____myown eyes.

Which products can not have the advertisement?

A. Houses
B. Foods
C. Books
D. Guns

超声波治疗疾病的最基本机制是( )。

A. 非热效应
B. 机械作用
C. 空化作用
D. 温热作用
E. 压强作用