生活中的科学活动的特点是（）
A.教师选择学习内容
B.没有具体的活动目标和计划
C.学习过程中教师直接指导
D.学习形式以小组活动为主
参考答案：B
发生弹性形变的物体具有的能量叫做______；三峡大坝提高水位是为了增加水的______能．
While implementing your project，a team member brings to your notice a risk that was not mentioned in the risk response plan．In this case，you should______．
A．accept the risk
B．perform additional risk response planning to control the risk
C．inform the project sponsor
D．use project contingency
