内发论
参考答案：是一种个体身心发展动因观点，一般强调人的身主发展的力量主要源于人自身的内在需要，身心发展的顺序也是由身心成熟机制决定的。
— Look! How long ________ like this?
— Three weeks! It's usual here that rain ________ without stopping these days of the year.[ ]
A. has it rained; poured
B. has it been raining; pours
C. is it raining; is pouring
D. does it rain; has poured
茶树枝梢生育有哪些规律？
