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【多选题】
实验中,促进凝集现象的措施有A.
低温离心
B.
增加电解质或蛋白质
C.
加入右旋糖酐或葡聚糖
D.
用胰酶处理
E.
加入抗原
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皮皮学刷刷变学霸
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A.
right
B.
precise
C.
accurate
D.
exact
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【单选题】Tom all his loan after twenty years during his family lived a hard life. [ ]
A.
paid back;when
B.
paid off;why
C.
paid off;which
D.
paid for;that
【单选题】When he was set free after twenty years in prison, he was amazed ______ the changed world he found.
A.
at
B.
of
C.
on
D.
to
【简答题】He finally won his after twenty years in jail.
【简答题】阅读理解。 After twenty years of shaving himself every morning, a man in a small Southern town thought he had enough. He told his wife that he wanted to let the barber shave him every day. He put on his ha...
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