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【单选题】
关于间接免疫凝集抑制说法正确的是A.
已知抗原致敏颗粒载体和相应抗体,可测标本中是否存在和致敏抗原相同的抗原
B.
反向间接免疫凝集抑制试验用于检测标本中的抗原
C.
正向间接免疫凝集抑制试验用于检测标本中的抗体
D.
出现凝集现象,说明标本中存在与抗原致敏颗粒相同的抗原
E.
无凝集现象,说明标本中不存在与抗原致敏颗粒相同的抗原
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【单选题】When I arrived home, my mother____the dinner.
A.
cook
B.
is cooking
C.
was cooking
D.
would cook
【简答题】句型转换 1. He waited until his mother arrived.(改为同义句） He____ until his mother arrived. 2. I should write him a letter.（对划线部分提问） _______ ______ ________ do? 3. My shoes are out of style.（改为反意疑问句） My shoes...
【单选题】When I arrived home, my mother ___the dinner.
A.
cooked
B.
is cooking
C.
was cooking
D.
would cook
【简答题】December 24 arrived along with a heavy snow. It was my first Christmas Eve without my mother, and the day’s usual 36 had disappeared. The telephone rang. I 37 it and went to my bedroom to bury the con...
【单选题】when I arrived home ,my mother ( )the dinner.
A.
cooked
B.
is cooking
C.
was cooking
D.
would cook
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