问题
单项选择题
有关爆炸网络电阻小的原因下面叙述正确的是（）。
A.炮线间的连接处接触不良或个别炮井中的雷管本身电阻大
B.炮线间的连接处某处短路，连接处正负极碰到一起
C.炮线连接处有断路现象或组合井间的炮线断路
D.连接处两个接头碰到一起
答案
参考答案：B
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有关爆炸网络电阻小的原因下面叙述正确的是（）。
A.炮线间的连接处接触不良或个别炮井中的雷管本身电阻大
B.炮线间的连接处某处短路，连接处正负极碰到一起
C.炮线连接处有断路现象或组合井间的炮线断路
D.连接处两个接头碰到一起
参考答案：B
Stress （压力） is everywhere in our everyday life. Not only men have it, but also women and young people. The most important reasons of stress are：death, diseases, exams, making money, getting married, moving houses, changing jobs, ending friendships and so on . How do you know whether you have stress? Could you give your answers to the following questions?
Doing relaxing exercises, talking with friends and listening to light music are all usual ways of relieving（减轻） stress. However, doctors now say that there are easier ways—people should laugh and smile more often. When you laugh and smile, your body relaxes. They also say that people, especially men, should cry more often, because crying is the natural way of relieving stress. 小题1:Who has got stress in everyday life? A. Men and women. B. Young people. C. Both A and B. 小题2: If you have over problems listed in the table, you are the person with stress. A. two B. three C. eight 小题3:Which of the followings is NOT the reason of stress? A.Taking exams. B. Taking sleeping pills. C. Making money. 小题4:What’s the easier way to relax your body? A. Talking with friends. B Doing relaxing exercises. C. Laughing, smiling and crying. 小题5:The main idea of the passage is . A.about stress and how to relieve your stress B. that there are many reasons for having stress C.that laughing and smiling more can help relieve your stress |