当混凝土试件送检不合格后,如何处理:到施工现场____、或者回弹;如果再不合格,返工处理
The Native American interpreter Sacajawea was a valuable member of the Lewis and dark expedition in 1805.()
A. very friendly
B. very useful
C. very thoughtful.
D. very wealthy
One of the greatest breakthroughs for professional women came in 1973 when the field of banking opened up for them.()
A. most serious disappointments
B. most significant advances
C. most abrupt declines
D. most crucial situations