6. As there is less and less coal and oil, scientists are exploring new ways of making use of   energy, such as sunlight, wind and water for power and fuel.

A．primary

B．alternative

C．instant

D．unique

男性，28岁。尿急、尿痛伴 * * 口脓性分泌物2天就诊。否认不洁性行为史。

患者治疗未遵医嘱，症状多次反复，现出现尿流变细，尿不尽及排尿困难症状。最可能的是并发了（）。

A.慢性前列腺炎

B.淋菌性 * * 狭窄

C.非淋菌性 * * 炎

D.慢性后 * * 炎

E.慢性淋菌性 * * 炎