随测9:科学初二上册第8章
Quiz
•
Science
•
8th Grade
•
Practice Problem
•
Medium
符美银 JH
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
能协调各器官系统活动的是____。
循环系统
神经系统
呼吸系统
消化系统
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如上图,冰漂浮在水面上,沉于酒精中,则下列说法正确的是
冰的密度大于水
冰的密度小于酒精
酒精的密度大于水
水的密度大于冰
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
妈妈炒菜的油用去半瓶后,剩余半瓶的 _____。
质量减半,密度减半
质量不变,密度不变
质量减半,密度不变
质量减半,密度增大
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
人的手不小心被烫了一下,正确的是 _____ 。
因为感到痛而缩手
缩手和感到痛同时发生
只缩手不感到痛
先缩手后感到痛
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
反射是神经调节的基本方式,下列叙述错误的是_____。
反射必须有完整的反射弧
反射弧是一种神经结构
反射需要多个系统的参与
反射要受大脑的控制
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
在反射弧结构中,产生神经冲动的是 _____。
传入神经
传出神经
效应器
感受器
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如图所示的神经结构叫做 _____。
神经元
反射弧
反射
脊髓
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