慢性支气管炎患者呼吸道感染时，最常致病的革兰阴性杆菌为（）

A.流感嗜血杆菌

B.大肠埃希菌

C.肺炎克雷伯杆菌

D.铜绿假单胞杆菌

E.变形杆菌

有以下程序#include struct STU{char name[9]; char sex; int score[2];};void f(struct STU a[]){struct STU b = {"Zhao", ’m’, 85, 90};a[1] = b;}main(){struct STU c[2] = {{"Qian", ’f’, 95, 92}, {"Sun", ’m’, 98, 99}};f(c);printf("%s,%c,%d,%d,", c[0].name, c[0].sex, c[0].score[0], c[0].score[1]);printf("%s,%c,%d,%d,", c[1].name, c[1].sex, c[1].score[0], c[1].score[1]);}程序运行后输出结果是

A．Zhao,m,85,90,Sun,m,98,99

B．Zhao,m,85,90,Qian,f,95,92

C．Qian,f,95,92,Sun,m,98,99

D．Qian,f,95,92,Zhao,m,85,90