弹子
参考答案:
弹子是弹子锁的控制零件,是锁的主要零件之一。其结构有三种型式、圆头弹子、平头弹子、异形弹子。
.—Excuse me,Miss Smith.Could you tell me how to improve my spoken English?
—OK.The best way is to practice ________.
A.as soon as possible
B.as quickly as possible
C.as much as possible
D.as clear as possible
把0.3米:20厘米化成最简单的整数比是______,比值是______.