What is the main idea of the third paragraph?
A．An ecosystem is a community that includes animals, plants, and microscopic bacteria.
B．Local ecosystems depend on each other, so human activity should be cautiously planned.
C．In managing the ecology of an area, we should use natural succession to our advantage.
D．People should remember that they are a part of the ecosystems where they live and work.

未分类题执行crm战略时，需要注意的与“客户关怀”有关的要素包括()。

未分类题Which of the following is NOT true about behavioral economics?A．People coming up with Stealth Health apply this subject.B．It focuses on the way people make their decisions.C．It mainly pays attention to how environment affects people's decision.D．It advocates leading people to make right decisions while giving enough options.

未分类题Which is the authors attitude towards Stealth Health?

未分类题管理的特征是()。

未分类题It can be concluded from the text that______.A．the phenomenon of shyness is incurableB．the shyness is not something a child can easily controlC．the shyness is a brain defect that may require outside helpD．the shyness is a normal part of all children to some extent or another