()的工具称为拉紧工具。
A.将所装配零件压紧
B.扩大或撑紧配件
C.将所装配零件的边缘拉到规定尺寸
D.将所装配零件紧固
参考答案:C
On the graduation day, he received from his father a nice present ______ a note was attached, saying “I’m proud of you.”
A.on which
B.to which
C.with which
D.in which
当前,上海合作组织面临的最大挑战是
A.“三股势力”的危害
B.本组织各成员国能否有效维护各自的主权、安全、发展利益
C.外部势力的干涉
D.成员国内部的凝聚力