广谱抗菌药喹烯酮主要对动物的哪个系统的致病菌作用较强（） A._爱下问搜题

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问题单项选择题

广谱抗菌药喹烯酮主要对动物的哪个系统的致病菌作用较强（）

A.肠道致病菌

B.呼吸道致病菌

C.循环系统致病菌

D.生殖系统致病菌

E.神经系统致病菌

答案

参考答案：A

选择题

Zhang Qiang failed his math test. So he feels very _____________.[ ]

A. happy

B. sad

C. excited

选择题

His bag fell off his bike. He stopped _______ it up. [ ]

A. picking

B. pick

C. picked

D. to pick