如果是对开式轮辋,在拆卸充气轮胎前应先()。
A、松开轮辋螺母
B、松开轮辋螺栓
C、加足轮胎气压
D、释放轮胎气压
参考答案:D
对骨骼肌的叙述中,不正确的是( )
A骨骼肌两端的肌腱分别固着在骨的两端
B骨骼肌两端的肌腱分别附着在临近的两块骨上
C骨骼肌由肌腹和肌腱两部分组成
D骨骼肌接受刺激后能够收缩
— Isn't it a surprise that I happened to meet Emily at Doris' birthday party last weekend?
— If my memory serves me correctly, you each other for exactly three years. [ ]
A. hadn't seen
B. haven't seen
C. didn't see
D. don't see