A-A+
We shall probably never be able to ______ the
问题详情
We shall probably never be able to ______ the exact nature of these sub-atomic particles.
A．assert
B．impart
C．ascertain
D．notify请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：C
解析：ascertain意为“查明，弄清，确定”，同answer，clearup，findout，learn，例如：Wemustascertaintheusualcustomsofthelocalpeopleandarrangeaccordingly．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：Letmeassertmyfilmbeliefthattheonlythingwehavetofearis
