In Study2, Site3 was used to study the:
A. preference of a different ant species for the seeds of both plant species.
B. seed preference of ants in an area in which both plant species were absent.
C. growth and survival of both plant species in an area where ants were not present.
D. effects of elaiosome mass on the seed preference of ants.
某员工将一块青铜铸造成为门的把柄，所得价值为21美元，又将其铸造成为一件工艺品所得价值为28万美元，其中所体现的是()。
A. 诚信品质
B. 创新精神
C. 金钱至上
D. 合作意识
His peers admonished him that he had to increase his study time as the final examination was around the corner.
A. astonished
B. warned
C. threatened
D. alarmed
简述关键绩效标准水平的种类，并说明为什么要对关键绩效标准水平进行有效控制。
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