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【单选题】
SECTION B PASSAGES Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow. 听力原文: Healthy people with stressful jobs who work long hours but get little satisfaction from what they do have twice the risk of dying from heart disease as satisfied employees, according to a study. Job stress has been known to trigger heart problems in people who already have cardiovascular disease. Obesity, high blood pressure, lack of exercise and smoking contribute to heart disease. Study indicates that job stress also plays an important role. Workers who had the highest jab-related stress levels were more than twice as likely to die of heart disease, according to the study published in the British Medical Journal. Work stress involves too much work as well as a lack of satisfaction and feeling undervalued and unappreciated. Many people work long hours but if the effort is rewarding the stress is minimized. Job pressure is damaging when being overworked is combined with little of no control, unfair supervision and few career opportunities. The British Heart Foundation said the results support earlier research showing that people in jobs with low control, such as manual workers, could be at greater risk of heart disease than other employees. 'It is advisable for people to try to minimize levels of stress at work and for employers to allow people to have more control at work and to be rewarded for their success,' the foundation said in a statement. Which of the following will NOT possibly lead to heart disease?
A.
High blood pressure.
B.
Oversleeping.
C.
Smoking and being overweight.
D.
Job stress.
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【单选题】相对性原理最早的阐述出自()
A.
伽利略
B.
牛顿
C.
爱因斯坦
D.
波尔兹曼
【简答题】电气控制线路的作用是:实现对电力拖动系统的______、_______、_______、________和________,满足生产工艺要求,实现生产过程自动化。
【判断题】黄金比例是设计中应用比较广的一种比例,其矩形比的长与宽为1:1.5。()
A.
正确
B.
错误
【简答题】电气控制线路的作用 是什么?
【单选题】用来分析电气控制线路工作原理的图是电气( )。
A.
原理图
B.
布置图
C.
接线图
D.
系统图
【判断题】总公司送交分公司的商品按高于成本计价所产生的“存货加价”,应视同未实现利润,其最终要在联合会计报表中予以抵销。( )
A.
正确
B.
错误
【判断题】黄金分割是按黄金比例的量进行分割的。
A.
正确
B.
错误
【简答题】电气控制线路的作用是:_________________________________________________________________。
【单选题】在桥式吊车电气控制线路中,凸轮控制器的作用是控制绕线异步电动机的( )。
A.
正反转起动、运转和停车
B.
正向起动和停车
C.
反向起动、停车
D.
停车
【单选题】下列几组花卉中全部是木本花卉的是()。
A.
香雪球、小蜡、女贞
B.
丁香、四季秋海棠、天竺葵
C.
紫藤、月季、垂丝海棠
D.
桂花、荷花、牡丹
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