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【简答题】
称取 700 mg 蛋白酶粗制品,配成 700 mL 溶液,取0.5 mL ,凯氏定氮法测蛋白氮 0. 05 mg ,另取 0.1mL 溶液测酶活力,结果每小时可以水解酪蛋白产生 1500 μ g 酪氨酸,假定 1 个酶活力单位定义为 每分钟产生 1 μ g 酪氨酸的酶量,请计算: 1 克该酶制品中蛋白质含量?总活力?比活力? ( 6 分 ) 要求上传所做的过程图片
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【单选题】People ______ say “me”, “myself” and “I” frequently are more likely to suffer with depression and anxiety, according to a new research.
A.
whoever
B.
whom
C.
whomever
D.
who
【简答题】In times of economic cr. Americans turn to their families for support. If the Great Depression is any guide, we may see a drop in our skyhigh divorce rate. But this won't necessarily represent. an...
【单选题】Recently I was an observer at _____ parent education seminar about the depression, suicide, and anxiety disorders affecting _____ children.
A.
the ; the
B.
the ; a
C.
a ; /
D.
a ; the
【单选题】In my twenties, I was______to anxiety and depression, which I experienced as a depletion of my self-esteem.
A.
inclined
B.
accountable
C.
prone
D.
poised
【简答题】In times of economic cr, Americans turn to their families for support. If the Great Depression is any guide, we may see a drop in our skyhigh divorce rate. But this won’t necessarily represent an ...
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