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如图所示用一把刻度尺和两块三角板测一枚硬币直径的示意图，由图示可知刻度尺分度值是      ，硬币的直径是        cm。

答案

分析：刻度尺的分度值为相邻的刻度线表示的长度；起始端没从0开始，把1.50cm处当作“0”刻度，读出末端刻度值，减去1.50cm即为物体长度，注意刻度尺要估读到分度值的下一位．

解：此刻度尺的分度值为1mm，本次测量起始端没从0开始，把1.50cm处当作“0”刻度，读出末端刻度值，减去1.50cm即为物体长度，即物体长度=3.76cm-1.50cm=2.26cm．

故答案为：1mm；2.26．

点评：刻度尺是初中物理中基本的测量工具，使用前要观察它的量程和分度值．刻度尺读数时要估读到分度值的下一位；其它测量工具对这一点没有特殊的要求，能正确读出示数就可以．

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Stress is our response to threatening or (1) events. We may experience different levels of stress depending on the (2) , meaning the events or circumstances that cause us to feel stress. Stressors can be classified into (3) main categories: (4) events, personal stressors, and (5) stressors. Cataclysmic events are major events that cause stress (6) , immediately, for a great many people at once. Personal stressors are major life events that create stress, including (7) life events. Background stressors are (8) hassles, or minor irritations, or (9) background stressors. Repeated exposure to stressors has both psychological and (10) consequences. The long- term consequence is that body tissues such as the heart and blood vessels can begin to (11) . The (12) system functions less effectively, and (13) our ability to fight off illnesses.
The General Adaptation (14) explains the sequence of physiological reactions to stress. There are three phases to G. A. S. The first is the " alarm and (15) " phase: we respond with alarm, and take (16) to remove the stressor. The second phase is the (17) stage: we fight against the stressor or try to cope with the stressor. This can lead to the third phase. (18) . The exhaustion phase may be an (19) way of trying to avoid the stressors. The body may be telling us that we need to do whatever is (20) to remove the stressor.

Stress is our response to threatening or (1) events. We may experience different levels of stress depending on the (2) , meaning the events or circumstances that cause us to feel stress. Stressors can be classified into (3) main categories: (4) events, personal stressors, and (5) stressors. Cataclysmic events are major events that cause stress (6) , immediately, for a great many people at once. Personal stressors are major life events that create stress, including (7) life events. Background stressors are (8) hassles, or minor irritations, or (9) background stressors. Repeated exposure to stressors has both psychological and (10) consequences. The long- term consequence is that body tissues such as the heart and blood vessels can begin to (11) . The (12) system functions less effectively, and (13) our ability to fight off illnesses.
The General Adaptation (14) explains the sequence of physiological reactions to stress. There are three phases to G. A. S. The first is the " alarm and (15) " phase: we respond with alarm, and take (16) to remove the stressor. The second phase is the (17) stage: we fight against the stressor or try to cope with the stressor. This can lead to the third phase. (18) . The exhaustion phase may be an (19) way of trying to avoid the stressors. The body may be telling us that we need to do whatever is (20) to remove the stressor.
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单项选择题

数字数据网中，不同等级的网络主要用2048KBit/s数字信道互联，也可用N×（）KBit/s数字信道互联。

A.16

B.32

C.64

D.128
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