胸外伤时,下列哪种情况不是立即开胸探查术的指征()
A.闭合性气胸
B.食管裂伤
C.胸内异物存留,有咯血等临床症状
D.气管、支气管断裂
E.进行性血胸
参考答案:A
Doctors _____ in every part of the world now.[ ]
A. are needing
B. are needed
C. were needing
D. were needed
□÷12=108…□,要使余数最大,被除数是______,余数是______.