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Passage One

A．The latent period of flu is longer.
B．The symptoms of flu developed suddenly.
C．The symptoms of flu are greatly different.
D．The infected objects of flu are different.
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单项选择题
A．The closer the relationship is, the easier loneliness spreads.B．Loneliness spreads more easily among men than women.C．A wife can be strongly affected by the loneliness of her husband.D．Loneliness can be delivered indirectly from person to person.
A．The closer the relationship is, the easier loneliness spreads.
B．Loneliness spreads more easily among men than women.
C．A wife can be strongly affected by the loneliness of her husband.
D．Loneliness can be delivered indirectly from person to person.
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