【单选题】以下命题哪个是错误的
A.
如果几何图形对某一轴的静矩为零,该轴必定过形心
【简答题】根据长时记忆的遗忘理论与小学儿童记忆发展的特点,并结合自己教学经验谈谈如何帮助小学生增强记忆能力。(要求至少解释清楚两种长时记忆的遗忘理论)
【单选题】Which of the following statements is TRUE?
A.
The Erie Canal connected Lake Erie and the Hudson River.
B.
Economists are of the opinion that places where farming is done are good for making raw materials into finished goods.
C.
Wagons drawn by horses and oxen soon proved to be better and cheaper than canal transportation.
D.
The coming of the railroads caused New York to become less important as a shipping center.
【多选题】小明要背100个单词,背完时花了很长时间,刚开始背的几个单词由于时间长了已经不记得,再第二天重新回忆时发现中间背的单词记忆最差,后面背的记忆最好。 这可用什么遗忘理论解释?
【单选题】以下命题哪个是错误的:
B.
EDFA 与掺铒光纤激光器的工作机理均为受激辐射
【单选题】Among the five Great Lakes, which one is wholly within the United States?
【单选题】可以用哪个理论来解释长时间学习效果不好的原因?
【单选题】以下命题中错误的是( )
D.
若一个平面经过另一个平面的一条垂线,则这两个平面垂直