老人口腔患有霉菌感染时应选用（）漱口溶液。
A、生理盐水
B、双氧水
C、碳酸氢钠溶液
D、醋酸溶液
参考答案：C
Shortly after the accident two ____ policemen were sent to the spot to keep order.
A．score of
B．scores
C．score
D．scores of
