店内及店外3米以内保持无垃圾,()。
参考答案:无杂物、无污迹、无纸屑、无烟头
He offered the information the police needed and deserved _____.[ ]
A. rewarded
B. to reward
C. being rewarded
D. rewarding
学术中心课程(以专门的学术领域为核心开发的课程)的基本特征:学术性、()、结构性。