河南成教 / 大学英语4
正确率：100%
3[单选题]
First published in 1927, the chart remains an _ _ _ _ _ _ source for researchers.
A.identical
B.inevitable
C. intelligent
D. indispensable
First published in 1927, the chart remains an _ _ _ _ _ _ source for researchers.
参考答案：
佳题速递：