鱼的分档可取鱼头、鱼尾、（）鱼中段等。
A、鱼背
B、鱼鳃
C、鱼尾骨
D、鱼头骨
参考答案：A
______ of the danger of traveling by airplane, I often take the train as my first choice. [ ]
A. To convince
B. Convincing
C. Convinced
D. Being convinced
某一个社会文化区域内公众共同的行为准则叫做( )
A．时尚
B．舆论
C．风俗习惯
D．流言
