支气管扩张患者，经常咳绿色脓性痰，对该致病菌无效的药物是
A．阿奇霉素B．哌拉西林C．头孢他啶D．环丙沙星E．亚安培南
参考答案：A
— Who is that man over there? Is it Mr. Wang?
— That _____ Mr. Wang. He has gone to Beijing. [ ]
A.. must be
B. mustn't be
C. can't be
D. can be
碳黑洗涤塔塔底液位高于控制指标会导致出塔工艺气带水。
