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We shall probably never be able to ______ the exact nature of these sub-atomic particles.
We shall probably never be able to ______ the exact nature of these sub-atomic particles.
admin
2009-01-05
46
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
ascertain意为“查明,弄清,确定”,同answer,clear up,find out,learn,例如:We must ascertain the usual customs of the local people and arrange accordingly.我们必须了解当地人民的风俗习惯,作出相应安排。assert意为“肯定地说,断言;维护,坚持”,例如:Let me assert my film belief that the only thing we have to fear is
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专业英语四级
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