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New and more ______methods have to be found for collecting earthquake data and analyzing i

题目

New and more ______methods have to be found for collecting earthquake data and analyzing it.

A. up-to-date

B. update

C. up to

D. outdated

参考答案
正确答案:A
[解析] up-to-date固定用法:新近的;现代的;新式的。