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【简答题】
称取25mg蛋白酶配成25mL溶液,取2mL溶液测得含蛋白氮0.2mg,另取0.1mL溶液测酶活力,结果每小时可以水解酪蛋白产生1500ug酪氨酸,假定1个酶活力单位定义为每分钟产生1ug酪氨酸的酶量,请计算:1. 酶溶液蛋白浓度及比活力;2.每克纯酶制剂的总蛋白含量及总活力。
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【简答题】Directions:This part is to test your ability to do practical writing. You are required to write a letter according to the following information given in Chinese. Remember to do the task on the Transla...
【简答题】函数 间断点有 个。
【简答题】简述经呼吸道吸收的过程。
【单选题】We are all for your proposal that the discussion .
A.
is put off
B.
would be put off
C.
be put off
D.
will be put off
【单选题】We are all for your advice that John at home until he makes a full recovery.
A.
remaining
B.
remained
C.
remains
D.
remain
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