需用巧克力血平板培养的细菌有（）。
A.脑膜炎奈瑟菌
B.肺炎球菌
C.百日咳鲍特菌
D.淋病奈瑟菌
E.流感嗜血杆菌
参考答案：A, D, E
能信企业如果将某项业务的资费设置为线性从量资费，则（ ）与用户使用的业务量成线性递增关系。
A．费率
B．资费水平
C．用户缴费总额
D．用户总数
—______ you ______ anything in that store?
—No, I ______, but Jim ______.[ ]
A. Did; bought; didn't; bought
B. Did; buy; didn't; bought
C. Did; bought; didn't; buy
D. Did; buy; didn't; did
