Parents speak loud in teacher selection in their child's early learning because______.
A. it is torturing to wait for news of classroom assignments
B. they consider it great to be a teacher in basic education
C. they are used to directing nearly all aspects of their child
D. it is custom to meet and argue with the school principle
查看答案
How does Mark Friedman respond to parents' requests to choose teachers？
A. He blames them.
B. He cheats them.
C. He promises to consider them.
D. He promises to satisfy them.
澳门特别行政区的区徽上面有()。
A. 中文
B. 葡萄牙文
C. 大三巴牌坊
D. 五星
E. 大桥 F．海水
已知产量为100单位时，总成本是300元，产量增加到150单位时，平均成本等于5元，在产量变化的范围内，边际成本()。
A. 随着产量的增加而上升，且数值小于平均成本
B. 随着产量的增加而上升，且数值大于平均成本
C. 随着产量的增加而下降，且数值小于平均成本
D. 随着产量的增加而下降，且数值大于平均成本
_____
A. 用例图
B. 类图
C. 对象图
D. 部署图
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