最可能的诊断是
A.肺炎球菌肺炎
B.支原体肺炎
C.克雷伯杆菌肺炎
D.肺结核
E.急性心肌梗死
参考答案:A
当m______时,关于x的一元二次方程(1-m)x2+x+1=0有实数根.
Your essay is quite good: just _____ it _____ with a few illustrations and quotations.
A.put .. up
B.touch .. up
C.cut .. out
D.write .. off