人体在 和 的调节之下，成为一个复杂、协凋、统一的整体，使各种生命活动能够正常进行．
人体之所以是一个统一的整体，是由于神经系统的调节作用，同时内分泌腺分泌的激素对人体也有调节作用；激素调节是体液调节的主要调节方式，必须靠体液来运输，它的作用途径自然是体液的传送，二者密切配合共同完成人体的自我调节．其中，以神经调节为主，它具有作用时间短，快速准确的特点，人体的各项生命活动常常同时受神经和激素的调节，正是由于这两种调节方式的相互协调，相互影响的，各器官、系统的活动才能协调一致，使人体成为一个复杂、协调、统一的整体．
故答案为：神经；激素
| 选词填空。从方框中选择适当的选项，使短文通顺。有两项是多余的。 | |
| |
| Americans spend their weekends in different ways. But usually they choose the same aim (目的) to rest, to 1________ beautiful places and to enjoy the time with their 2________ and friends. Some Americans hold parties on Saturday night. They will dance, sing and drink together till midnight. They won't get up 3________ 9 or even 11 o'clock next. morning. As 4________ as they get up they will go to the nearest shop to buy the daily newspaper. They can get news about films, plays, shows and sports in the newspaper. It will help them to decide 5________ to do on Sunday afternoon. Before 6________ 0ut on Sunday, they will have a meal, which is 7________ "brunch" ------ "br" from 8________ and "unch" from "lunch". They will make it at home to go to a nearby restaurant. After brunch some Americans may have a picnic. They will take many things with them, such as fruit, vegetables and so on. Sunday dinner i.s the most 9________ meal of the week. It is the biggest meal of the week and all family members try to be present. Weekends are to be welcome 10________ .Most people hope for them. 1. ________ 2. ________ 3. ________ 4. ________ 5. ________ 6. ________ 7. ________ 8. ________ 9. ________ 10. ________ |