一位同学不慎被小刀划破手指,流出了血,小刀至少划到了皮肤的( )
A.表皮角质层
B.表皮生发层
C.真皮
D.皮下组织
答案:C
流出了血,说明划到了血管,皮肤的真皮中有血管分布。
划长度大于1m且小于5m的直线时,一般采用______划直线。
A.弹粉线法
B.直尺
C.拉钢丝法
You are proceeding to a distress site.The survivors are in liferafts.What will make your ship more visible to the survivors().
A.Steering a sinuous course
B.Steering a zig-zag course
C.Turning on all available deck lights at night
D.Dumping debris over the side to make a trail to your vessel