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问题 单项选择题 A1/A2型题

散射免疫比浊法测定时，为保证能与标本中的抗原完全反应，必须使（）

A.检测体系抗原保持过量

B.检测体系抗体保持过量

C.充分稀释待测样品

D.具足够强的发射光

E.足够强的照射光

答案

参考答案：B

解析：散射免疫比浊法采用抗体过量的原理是保证抗原-抗体反应形成不可溶性小分子颗粒，以获得小分子颗粒产生的最强的散射光信号。

填空题
选择恰当的单词并用其正确形式将短文补全完整。
rule,practice,join,after,dinner,for,out,read bed,get

     Emily has so many      1      at home. She has to do her homework       2       school. She can't go     3     on school nights. She has to wash the dishes（洗碗）after       4       ,and then she can watch TV      5      . an hour. She likes       6      . .She usually does some reading at night. She has to be in      7      . by ten
o'clock because she has to       8      . up early the next morning. She        9      a music club and often goes
there on weekends. She has to       10       her guitar every day. But she doesn't think she's unhappy.
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单项选择题

l211灭火器的重量如下降多少，就要灌装充气（）。

A.5

B.8

C.10

D.12
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