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【单选题】
关于直接法荧光抗体染色的特点,错误的是A.
简单易行，特异性高
B.
敏感度偏低
C.
每检测一种抗原需制备一种相应的荧光抗体
D.
非特异性荧光染色因素少
E.
可检测抗原及抗体
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反馈参考答案：
举一反三
【单选题】While the doctors analyzed the patient’s condition, his family waited outside in considerable( ).
A.
tension
B.
anticipation
C.
eagerness
D.
anxiety
【简答题】Having waited for 2 hours, the author began to lose _________.(patient)
【单选题】Having finished her project, she was invited by the school to the new students.
A.
speaking
B.
having spoken
C.
to speak
D.
to have spoken
【单选题】The nurse watched over the patient and waited ______ him day and night.
A.
about
B.
for
C.
on
D.
up
【简答题】Having finished her homework, Ma Li wants some music for relaxation ① . As usual, she starts her computer and goes to Baidu.com to download music files. But this time she is surprised when an announce...
【简答题】Having finished her homework，Ma Li wants some music for relaxation(娱乐)．As usual，she starts her computer and goes to Baidu.Come to download music files.But this time she is surprised when an announceme...
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