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【单选题】
玻片法做ABO血型鉴定，属于A.
直接凝集反应
B.
协同凝集反应
C.
间接血凝反应
D.
间接凝集抑制反应
E.
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举一反三
【简答题】一对减速齿轮传动,若保持两齿轮分度圆的直径不变,而减少齿数和增大模数时,其 齿面接触应力将 。
【简答题】阅读理解 So you're between the ages of 13 and 24. What makes you happy? A worried, weary parent might imagine the answer to sound something like this: , drugs, a little rock 'n' roll (摇滚乐). Maybe some ...
【单选题】What makes traditional surveys unscientific according to the second paragraph?
A.
The sampling is not made strictly randomly.
B.
The interview has to be conducted face-to-face.
C.
Improper questions are often included in a survey.
D.
Selection of respondents is often a matter of personal decision.
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