【单选题】Mrs. Johnson takes pride ______ her daughter, who came first in the race.
【单选题】Mrs. Johnson takes pride _____ her daughter, who came first in the race.
【单选题】.用例图建模技术包括两部分即:( )和对需求建模。
【单选题】可用于距离较大的两轴间运动及动力传递的机构是 _______ 。
【单选题】Mrs. Johnson takes pride _____ her daughter, who came first in the race.
【单选题】某工厂生产A,B两种成本不同的产品,由于市场发生变化,A产品连续两次提价20%,B产品连续两次降价20%,结果都以23.04元出售,若此时厂家同时出售A,B产品各一件,则相对没有调价的盈亏情况是