【題目】An _________ is a scientific test that is done in order to discover what happens and to get new knowledge.
A.experiment
B.exchange
C.example

【答案】A
【解析】句意：一個……是一個科學(xué)測試，為了發(fā)現(xiàn)發(fā)生了什么還有獲得知識。A.實(shí)驗(yàn)； B.交換； C.例子。結(jié)合句意選A。

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