Newton ________ weight (重力) .

[　　]

A．discover
B．discovered
C．found
D．invented

答案：B
解析：

解析：根據(jù)題意，牛頓發(fā)現(xiàn)了重力，要用一般過去時態(tài)，此項屬于科學方面的發(fā)現(xiàn)，用discover。故選B。


提示：

啟示：discover意為“發(fā)現(xiàn)”。指發(fā)現(xiàn)本身就存在，但尚未為人所知的事情、地方、思想等。也用于指發(fā)現(xiàn)自己以前不知道的事實。跟find意思很接近，但表示新發(fā)現(xiàn)，尤指科學發(fā)現(xiàn)時，只能用 discover。其后可跟名詞、代詞、名詞性從句等作賓語，有時也可使用“連接副詞／連接代詞＋動詞不定式”的結(jié)構(gòu)作定語。discover和invent不一樣，后者只指“發(fā)明”，即創(chuàng)造出世界上不存在的事物。


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