生态理论是强调反人类中心主义,标举自然中心
参考答案:对
You must be there within an hour. There should be no ____in sending the information. [ ]
A. question
B. hesitation
C. delay
D. problem
各集气站工业电视监控系统最少有()监控点。
A.4
B.5
C.6
D.7