【单选题】─Mrs.Zhang was sent to teach English in a poor mountain village last year. [ 来源 :~ 中国教育 ^* 出版 & 网 @ ─Shesaid she would never forget some pleasant ______while working there.
【单选题】0313 摩擦表面间没有润滑剂的配合件相互运动时,周围的介质对摩擦表面作用,将造成摩擦表面更大的--。
【单选题】─Mrs. Zhang was sent to teach English in a poor mountain village last year. ─She said she would never forget some pleasant ______while working there. [ ]
【单选题】下列不属于管制刀具的是
A.
带有刀柄、刀格和血槽,刀尖角度小于 60 度的单刃、双刃或多刃尖刀
C.
未开刀刃且尖倒角半径 R 大于 2.5 毫米的各类武术、工艺、礼品等刀具
D.
刀身展开或弹出后,可被刀柄内的弹簧或卡锁固定自锁的折叠刀具