A:激素调节
B:体液调节
C:高级神经中枢调节
D:低级神经中枢调节
抄写下列句子。
①Time for music class.
②It's 8 o'clock .It's time for English class.
③Hurry up .It's time to go to school.
④It's 9:00 .It's time to go to bed.
结合材料,运用“生产与经济制度”的知识,谈谈如何解决发展的不平衡不充分问题。