单项选择题

下面哪个说法是正确的？
A、工程活动一定会干预自然，改变环境。
B、只要工程活动足够小就不会影响环境。
C、只要技术足够先进就不会影响环境。
D、只要工程活动在别的国家就不会影响环境。

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函数在一点解析，则一定可以展为幂级数。
正确
错误

答案：正确

单项选择题

Which tip in the following is not mentioned by Prof. Xie to improve our English language ability and cultural awareness?

A．When met new words or phrases, ask the speaker for explanation, look it up in a paper dictionary or consult the digital dictionary on the internet.
B．Making guesses.
C．Ignore anything you don't understand.