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问题 选择题

保护易感人群的具体措施是[ ]

A．不让易感人群与传染源接触并进行预防接种

B．搞好环境卫生和个人卫生

C．消灭传播疾病的媒介，切断传播途径

D．对患者及时发现、及时治疗

答案

答案：A

多项选择题

急性结膜炎的常见致病菌为

A．流感嗜血杆菌

B．Koch-Weeks杆菌

C．金黄色葡萄球菌

D．大肠杆菌

E．Morax-Axenfeld杆菌
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选择题

I had wanted to help you last night but I couldn't spare any time, for I ______ a composition which

I have to hand in this morning. [ ]

A. wrote

B. was writing

C. had written

D. have written

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