教育心理学作为一门独立的学科,一般被认为产生于()。
A、18世纪末
B、19世纪末
C、18世纪中期
D、19世纪中期
参考答案:B
()本世纪第一位被称为“革命家”的设计大师。不随波逐流抓住新的时代潮流确立自己的风格。
In a certain animal population, for each of the first 3 months of life, the probability that an animal will die during that month is . For a group of 200 newborn members of the population, approximately how many would be expected to survive the first 3 months of life ?