题目

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。Stress used to be an almost unknown word, but now that we are used to talking about it, I have found that people are beginning to get stressed about being stressed. In recent years, stress 【1】 (regard) as a cause of a whole range of medical problems, from high blood pressure to mental illness. But like so many other things, it is only too much stress 【2】 does you harm. It is time you considered that if there were no stress in your life, you would achieve a little. If you are stuck 10．如图1所示，金属块挂在弹簧测力计下，将金属块慢慢放入水中，弹簧测力计的示数逐渐减小，如图2是弹簧测力计示数与金属块下降距离的图象，由图可知，金属块完全浸没在水中时受到的浮力为N，密度是2.5×103kg/m3．（g取10N/Kg）