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【单选题】
动物采血应在末次免疫后（）A.
1～3天
B.
6～7天
C.
7～10天
D.
10～20天
E.
20天以上
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反馈参考答案：
举一反三
【单选题】She ______ high levels of lead in her drinking water.
A.
perceived
B.
spotted
C.
detected
D.
discerned
【单选题】The rise in water levels is especially dangerous for small island nations and __.
A.
low-lying urban areas
B.
all coastal cities
C.
people who live on the beach
D.
Shanghai
【单选题】听力原文： India—Officials say water levels along the Brahmaputra River still are at dangerous levels although they are dropping. The officials say flooding has destroyed the homes of two and one half mill...
A.
they are not rising
B.
they are falling
C.
the rain has stopped
D.
it's clearing up
【简答题】MySQL 提供【 】语句用于删除表中的数据。
【简答题】凡经互感器接入的电度表，其读数要( )互感器的变化才是实际读数值。
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