【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
【单选题】皮亚杰提出儿童的认知表现是不一致的, 即使儿童已经具备解决某一问题必需的心理操作能力了,他还是不能解决需要相似的心理操作能力的其他类似问题。他把这种现象称为
【单选题】某物体作直线运动,其运动速度为 (单位为 ,求该物体从 =0 到 =3 这段时间内经过的路程( ) 。
【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】皮亚杰提出儿童的认知表现是不一致的,即使儿童已经具备解决某一个问题必需的心理操作能力,他还是不能解决需要相似的心理操作能力的其他类似问题。他把这种现象称为___。
【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.