两构件直接接触,并能作一定运动形式的相对连接,称为()。
A.机构
B.期潞
C.零件
D.运动副
参考答案:D
252. One of the purposes of United Nations is to achieve international co-operation without distinction as to race,____, language or religion.
A.sex
B.female
C.male
D.Skin
“阿Q精神”的具体表现有?