采用负压筛析法测定水泥的细度，不需要进行筛余结果的修正。
参考答案：错
We can see monuments here and there. Those who have made great _____ to human beings and society
will never be forgotten. [ ]
A. advance
B. progress
C. contributions
D. achievement
建立农村新型合作医疗制度有何重要意义？
