形状和位置公差是指零件的实际形状和实际位置对()和()的()变动量。
参考答案:理想形状;理想位置;允许
有关Ⅲ度烧伤的描述哪一项是错误的()。
A.全层皮肤烧伤,皮肤坏死、脱水后形成焦痂
B.创面蜡白或焦黄,甚至炭化
C.烧伤深度深,渗液多,创面疼痛明显
D.可见粗大栓塞的树枝状血管网
E.愈合后常形成瘢痕,且常造成畸形
_______ , the car stopped all at once.[ ]
A. Seeing a boy lying on the ground
B. The minute the driver saw a boy seated on the road
C. On seeing a boy sitting on the ground
D. The driver saw a boy standing on the road