We shall probably never be able to______ the exact nature of these sub-atomic particles.

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问题 We shall probably never be able to______ the exact nature of these sub-atomic particles.

选项 A、assert
B、impart
C、ascertain
D、notify

答案C

解析四个选项的意思分别是：assert声称，维护，坚持；impart传授，给予，告知，透露；ascertain弄清，确定，查明；notify通知，布告。句意是，我们也许永远不可能知道这些亚原子粒子的确切本质。根据句意可推出正确答案是C选项。

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考博英语

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We shall probably never be able to______ the exact nature of these sub-atomic particles.

考博英语

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Inrecentyears,teachersofintroductorycoursesinAsianAmericanstudieshavebeenfacingadilemmanonexistentafewdecades

Inrecentyears,therehasbeenanincreasingawarenessoftheinadequaciesofthejudicialsystemintheUnitedStates.Costsa

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Ifyoudosomethingon______,youdoitbecauseyousuddenlywantto,althoughyouhaven’tplannedto.

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