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【判断题】
向量函数的导数是一个数量A.
正确
B.
错误
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举一反三
【单选题】Most molecules and all ions require a process to across cellular membranes. The process is mediated by selective ( ).
A.
membrane transport proteins
B.
membran carbohydrate
C.
peripheral membrane proteins
D.
lipid-anchored membrane proteins
【单选题】According to the passage, which of the following is important in explaining a muscle movement（）
A.
The flow of blood to the muscles.
B.
Classical conditioning.
C.
Protein interactions.
D.
The entry of unpleasant stimuli through the cell membran
【单选题】根据软硬酸碱原理,判断下列各组配合物的标准生成常数 K 稳 相对大小,正确的是
A.
K 稳 (FeF 4- ) < K 稳 (FeCl 4- )
B.
K 稳 (Ag(CN) 2 － ) > K 稳 ( Ag(NH 3 ) 2 ＋ )
C.
K 稳 (CoF 6 3 － ) < K 稳 (CoF 6 4 － )
D.
K 稳 (HgCl 4 2 － ) > K 稳 (HgI 4 2 － )
【单选题】Solutions A and B are separated by a semipermeable membrane that is permeable to K + , but not to Cl - . Solution A is 100 mM KCl, and solution B is 1 mM KCl. Which of the following statements about s...
A.
K + ions will diffuse from solution A to solution B until the [K + ] of both solutions is 50.5 mM
B.
K + ions will diffuse from solution B to solution A until the [K + ] of both solutions is 50.5 mM
C.
KCl will diffuse from solution A to solution B until the [KCl] of both solutions is 50.5 mM
D.
K + will diffuse from solution A to solution B until a membrane potential develops with solution A negative with respect to solution B
E.
K + will diffuse from solution A to solution B until a membrane potential develops with solution A positive with respect to solution B
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