It is rather difficult to ____(习惯于) the customs of other countries.
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It seems as if he knew everything, but ____(事实上), he is as stupid as he can be.
____(众所周知), morning exercise does good to our health.
每个客户都是不同的,服务的标准必须因人而异,而且这一标准将取决于客户对企业的当前价值。
A. 对
B. 错