锁口是锻模的()基准,可防止上下模工作时,模槽合口产生偏移。
参考答案:导向
Which of the following would be the best title for this passage
A.Childhood Socializers
B.Norms & Role Models
C.Sources of Information
D.Agents of Socialization
含羞草科植物通常具有()
A.单叶
B.1回羽状复叶
C.2回羽状复叶
D.3回羽状复叶