结构修理中任何铆接都不准在铆接件之间有()、()或()。
参考答案:毛刺;金属屑;杂物
For most French people, friendship is a one-to-one relationship that demands a keen awareness of the other person's intellect, temperament and particular interest.
A.expulsion
B.disposition
C.precision
D.aversion
在动物进化的历程中,最先从水中登陆的脊椎动物是两栖动物。()