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【单选题】
大多数细胞产生和维持电位的主要原因是A.
细胞内高K+浓度和安静时膜主要对K+有通透性
B.
细胞内高K+浓度和安静时膜主要对Na+有通透性
C.
细胞内高Na+浓度和安静时膜主要对K+有通透性
D.
细胞内高Na+浓度和安静时膜主要对Na+有通透性
E.
细胞外高K+浓度和安静时膜主要对K+有通透性
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反馈参考答案：
举一反三
【简答题】表单的提交方法包括get和_______方法。
【简答题】表单的提交方法包括______和post方法。
【单选题】Which method loads the configuration which was active before your last commit?（）
A.
load replace last-active
B.
load rollback 1
C.
rollback 1
D.
rollback last-active
【简答题】表单的提交方法包括 post 和______ 方法
【多选题】Which three attributes are carried in a source active message?（）
A.
NLRI information
B.
IP address of originating RP
C.
address of multicast source
D.
all active RPs in the local domain
E.
group address to which the source is sending
【单选题】Which of the following statements about active center of enzyme is not true
A.
Binding of enzyme with substrate is limited to the small area of enzyme structure which is closely related to enzyme activity.
B.
The essential groups may locate either in or outside the active center.
C.
Usually consists of several amino acid residues adjacent to each other in the primary structure
D.
Zymogen activation is actually the process of forming complete active center.
E.
Binding of substrates can induce conformational change of the active center of enzyme.
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