A. improvements B. pains C. difficulties D. advantages

According to the speaker, what is an advantage of the change？A．Improve the quality of work

The main advantage of improved Simplex tailshaft seal are____.A.the good sealing performan

A. playing jokes onB. making a fool ofC. setting a trap for D. taking advantage of

A. burden B. sufferingC. anxietyD. difficulty

A. replacedB. changed C. coveredD. improved

急性动脉栓塞的临床表现可概括为5“P”征 以下选项中哪项错误A.疼痛( pain)B.无脉( pulselessness)