车祸现场有下列患者,应首先抢救的是()
A.肠穿孔
B.张力性气胸
C.小腿挫裂伤
D.脑挫伤
E.上肢开放性骨折
参考答案:B
— _____ shoes _____ these?
— They're Sally's and Joy's.
[ ]
A. Who's; are
B. What; is
C. Whose; are
D. How; are
定为基准,是工件安装时用以确定()表面位臵的点、线、面。
A.被加工
B.零件
C.内园
D.外园