( )所使用的关税和配额是最明显的壁垒。
A.关税升级
B.贸易出口
C.贸易保护
D.关税高峰
参考答案:C
______in 1636,Harvard is one of the top universities in the US. [ ]
A. Being founded
B. Found
C. Founded
D. Founding
试述中西文化的学习与比较要注意些什么?