已知某种植物的高度受2对基因控制,显性基因越多个体越高。一对中等高度的不同基因型个体杂交,F1全部表现为中等高度。以下判断正确的是()
A. F1全部是纯合体
B. F1纯合体和杂合体比例各占50%
C. F1自交,F2出现多种高度,表现型比例呈正态分布
D. F1测交,后代表现型有2种,比例为1:1
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假设一国国内生产总值为100万亿美元,进口总额为4万亿美元,出口总额为6万亿美元,则该国的对外贸易依存度为()。
A. 2%
B. 4%
C. 6%
D. 10%
ABC Corp. is implementing 11i Oracle Applications. The company has two local administrators in separate locations. They need to ensure that only a relevant set of users is visible to each of these local administrators. Which action will meet the requirement?()
A. create a separate role for each local administrator
B. specify user administration privileges in Oracle User Management
C. use Data Security to provide relevant access to each local administrator
D. use Function Security to provide relevant access to each local administrator