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【单选题】
关系型数据库的规范化理论指出:关系型数据库中的关系应满足一定的要求,最起码的要求是达到1NF,即满足( )。
A.
每个属性都是不可分解的
B.
每个非码属性都完全依赖于主码属性
C.
关系中的元组不可重复
D.
主码属性是惟一表示关系中的元组的
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【单选题】磁场内各点的磁感应强度大小相等、方向相同,则称为()。
A.
匀速磁场
B.
交变磁场
C.
均匀磁场
D.
恒定磁场
【单选题】Part A Directions: Read the following four texts. Answer the questions below each text by choosing A, B, C or D . Mark your answers on ANSWER SHEET 1. Children are a relatively modem invention. Until ...
A.
To show that men and women were smaller than now.
B.
To show that there were no children at all at that time.
C.
To show that children wore and acted like adults at that time.
D.
To show that children were not permitted to appear in paintings.
【单选题】在“尿生成影响因素”实验中,给家兔静脉注射20%葡萄糖溶液10ml,尿量将显著增多,其原因是( )
A.
肾小管溶液中溶质浓度增高
B.
肾小球滤过率增加
C.
血管升压素分泌减少
D.
醛固酮分泌增多
E.
肾小球有效率过压增高
【单选题】在“尿生成影响因素”实验中,给家兔静脉注射20%葡萄糖溶液10毫升,尿量将显著增多,其原因是(ZY1999)
A.
肾小管液中溶质浓度增高
B.
抗利尿激素分泌减少
C.
醛固酮分泌增多
D.
肾小球滤过率增加
E.
肾小球有效率过压增高
【单选题】Part A Directions: Read the following three texts. Answer the questions on each text by choosing A, B, C or D. Mark your answers on ANSWER SHEET 1. The art market is a window on the thoughts of the ve...
A.
We get to know the interest of the very rich through the art market.
B.
The art market is full of various thoughts.
C.
People can gain profit from the art market.
D.
The art market is such a place where only rich people can afford to go.
【单选题】在“尿生成影响因素”实验中,给家兔静脉注射20%葡萄糖溶液20毫升,尿量将显著增多,其原因是
A.
肾小管液中溶质浓度增高;
B.
抗利尿激素分泌减少;
C.
醛固酮分泌增多;
D.
肾小球滤过率增加;
E.
肾小球有效率过压增高;
【单选题】磁场内各点的磁感应强度大小相等、方向相同,则称为 ( ) 。
A.
均匀磁场 B 、匀速磁场 C 、恒定磁场 D 、交变磁场
B.
匀速磁场
C.
恒定磁场
D.
交变磁场
【单选题】磁场内各点的磁感应强度大小相等、方向相同,则称为()。
A.
均匀磁场
B.
匀速磁场
C.
恒定磁场
D.
交变磁场
【单选题】根据郎伯-比尔定律,吸光度与浓度和光路长度之间的正确关系式是
A.
A=-lgT=ECL
B.
A=-lgT=CL
C.
A=lgT=CL
D.
A=lgT=ECL
E.
A=-lgT=EC
【单选题】在“尿生成影响因素”的实验中,给家兔静脉注射 20%葡萄糖溶液 10mL,尿量 将显著增多,其原因是
A.
肾小管液中溶质浓度增高
B.
肾小球滤过率增加
C.
ADH 分泌减少
D.
醛固酮分泌增多
E.
肾小球有效滤过压增高
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