心源性哮喘与支气管哮喘主要不同点是
A.病史较长，反复发作
B.心前区收缩期杂音
C.心脏扩大伴奔马律
D.两肺干湿啰音
E.无肺气肿体征
参考答案：C
We can’t _____ other countries in trade if we don’t develop our national economy.
A．compete for
B．compete against
C．catch up
D．catch with
易致心律失常
A．乙醚B．氟烷C．硫喷妥钠D．氯胺酮E．东莨菪碱
