An antibody is Y-shaped and has __ identical antigen-binding sites, one on each arm of the Y.
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举一反三
- The basic principle of radioimmunoassay is A: The radiolabeled antigen reacted with excessive specific antibody B: The radiolabeled antigen reacted with a limited number of specific antibodies C: Radiolabeled antigen and unlabeled antigen reacted competitively with limited amount of specific antibody D: Radiolabeled antigen and unlabeled antigen reacted with excessive specific antibody
- Neighbours ought to respect _______. A: each one B: to each othe C: y themselves D: one anothe
- Ike's utility function is U(x;y) = 25xy. He has 12 units of good x and 8 units of y. Ben's utility function for the same two goods is U(x;y)=4x+4y. Ben has 9 units of x and 13 units of y.
- PCR is used to detect ( ) A: Antigen B: Antibody C: DNA or RNA D: Complement
- The type of blood is decided by ____.() A: The<br/>type of receptor on RBC membrane B: The<br/>type of antigen on RBC membrane C: The<br/>type of antibody on RBC membrane D: The<br/>type of antigen in plasma E: The<br/>type of antibody in plasma
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$x=5; $y=10; echo($x/$y)."[br][/br]"; echo$x%$y."[br][/br]"; echo$x.$y."[br][/br]"; echo$x!==$y 输出结果是什么？
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Tôi( ) chơi nhảy dây.
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Confucius is one of a handful of individuals who has shaped world history. Confucius as born into an ________ but impoverished family.
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When no modification has taken place,the information at the receiver is identical to the one at the sender before the ____ step.
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已知x.y.z为三个互不相同的正数,且y/x-z=x+y/z=x/y.求x:y