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【单选题】
鲜蛋的主要卫生问题是( )引起的微生物污染。A.
沙门菌
B.
肉毒杆菌
C.
副溶血性弧菌
D.
变形杆菌
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【单选题】_______
A.
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B.
Students trained for their first public speeches should be given lessons in a conversational setting.
C.
The future of those people afraid of giving a public speech lies in the training of making wonderful conversations.
D.
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C.
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为不给后面跟来的车辆带来不便，尽量迅速通行或驻车
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A.
Individuals good at conversations may find it hard to make their first speech before a large audience.
B.
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C.
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D.
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