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【单选题】
食物中毒与其他急性疾病最本质的区别是A.
潜伏期短
B.
很多人同时发病,急性胃肠道症状为主
C.
发病场所集中
D.
病人曾进食同一批某种食物
E.
临床表现不同
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举一反三
【单选题】The celebration of Thanksgiving Day has been observed to thank ______.
A.
God
B.
their ancestors
C.
their parents
D.
the Pilgrims
【简答题】What encouraging sign has been observed by experts about Venice?
【单选题】A Pike has, been observed to live, according to Gesner, as long as ______.
A.
any other fresh - water fish
B.
forty years
C.
it has the help of the sun's heat
D.
two centuries
【单选题】5 An important part of the national government is the Foreign Service，a branch of the Department of State．
A.
tree
B.
division
C.
root
D.
leaf
【单选题】The celebration of Thanksgiving Day has been observed to thank ______.
A.
God
B.
their ancestors
C.
their parents
D.
the pilgrims
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