食品安全问题不仅影响人们的健康,还可能会影响到一个国家的政局稳定以及经济、贸易。()
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下列条带在视觉表现()更醒目。
A. 红字蓝底
B. 黄字蓝底
C. 绿字蓝底
D. 蓝字蓝底
The sentence “Match the movie to your understanding” (Para. 4) means that you should.”
A. choose a movie that you can just understand
B. choose a film with a very interesting story
C. understand the movie fully and enjoy it
D. practice your speaking and listening while watching a movie
两列车重连时，通过（ ）进行定位
A. 凸锥和凹锥
B. 钩舌
C. 锁铁
一端车钩的（ ）会卡入另一端车钩的钩舌内、自动锁紧，完成机械连接
A. 锁铁
B. 连挂杆
C. 凸锥和凹锥
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