干性咳嗽常见于下列哪些疾病
A．慢性支气管炎
B．肺炎
C．支气管扩张
D．肺脓肿
E．急性咽喉炎
参考答案：E
_____ a solution to the problem of water shortage, we have to put all our efforts together. [ ]
A. To work out
B. Working out
C. Work out
D. Being worked out
能清热凉血、养阴生津的药物是（），（）。
