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【单选题】
装配精度包括()A.
尺寸精度和配合精度
B.
配合精度和尺寸链精度
C.
配合精度和尺寸精度
D.
以上说法都不对
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举一反三
【单选题】When investigating the rate of reaction of the enzyme lipase on the hydrolysis of triglycerides, the pH must be maintained at an optimum to prevent the lipase denaturing. What is the reason for this?
A.
The addition of water molecules produced by hydrolysis increases pH
B.
The products of hydrolysis decrease the pH
C.
The products of hydrolysis increase the pH
D.
The removal of water molecules used in hydrolysis decreases pH
【简答题】In cells and tissues, __________ and _________ buffer systems maintain intracellular and extracellular fluids at their optimum pH, which is usually close to 7.
【单选题】The optimum pH for trypsin and chymotrypsin is about
A.
1-3.
B.
5-7.
C.
7-9.
D.
10-12.
【简答题】最佳货币区(optimum currency area)
【简答题】The economically optimum stand management plan for an owner is that which maximizes the net present value or willingness to pay for bare land just before ______.
【简答题】In cells and tissues, _______ and _________ buffer systems maintain intracellular and extracellular fluids at their optimum (physiological) pH at 7.
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