进行课堂教学设计既要设计教师教的活动,也要设计学生学的活动,并要处理好二者之间的关系。
参考答案:对
It may have been unusually cold recently but experts say it's ________ for this time of year.
A.normal
B.formal
C.ordinary
D.common
现在对海洋初级生产力总量估计比过去高得多的主要原因?