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【简答题】

C erous Sports Around the world more and more people are taking part in er ous sports and activities.Of course, there have always been people who have looked for adventure—those who have climbed unknown parts of the world or sailed in small boats across the greatest oceans.Now, however, there are people who seek an immediate thrill, a risky activity, which may only last a few minutes or even seconds. I would consider bungee jumping to be a good example of such an activity.You jump from a high place(perhaps a bridge or a hot-air balloon) 200 meters above the ground with an elastic(有弹性的) rope tied to your feet.You fall at up to 150 kilometers an hour until the rope stops you from hitting the ground.It is said that about 2 million people around the world have now tried bungee jumping. Other activities which most people would say are as risky as bungee jumping include jumping from tall buildings and diving into the sea from the top of high cliffs.   Why do people take part in such activities as these? Some psychologists suggest that it is because life in modern societies has become safe and boring.Not very long ago, people’s lives were constantly in er. They had to go out and hunt for food, diseases could not easily be cured, and there was a continuous battle for survival. Nowadays, according to many people, life offers little excitement.They live and work in comparatively safe environments; they buy food in shops; there are doctors and hospitals to look after them if they become ill.The answer for some of these people is to look for er in activities such as bungee jumping. 65.The best title for the text is . A.erous Sports: What and Why B.The Boredom of Modern Life C.Bungee Jumping: Is It Really erous. D.The Need for Excitement 66.More and more people today . A.are tying activities such as bungee jumping B.are climbing the highest mountains C.are coming close to death in sports D.are looking for adventures such as traveling into unknown places 67.The writer of the text has a attitude towards erous sports. A.positive B.negative C.neutral(中立的) D.nervous

题目标签:弹性
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【单选题】以下哪种材料是可逆性弹性印模材料()。

A.
藻酸盐
B.
合成橡胶
C.
印模膏
D.
琼脂
E.
以上都不是

【多选题】劳动力需求的工资弹性取决于()。

A.
产品需求的价格弹性
B.
其他要素投入的供给弹性
C.
劳动力成本占总成本的比重
D.
劳动法律法规对劳动力供给的限制
E.
生产过程中其他要素投入替代劳动力的难易程度

【单选题】9个月婴儿,7kg,腹泻3天,蛋花汤样大便,一天来大便20余次,尿少,前囟、眼窝明显凹陷,皮肤弹性极差,脉细弱,四肢冷,血C0CP6.75mmol/L,前8小时补液,哪项是错误的()

A.
首先用2:1等张液140ml扩容
B.
补充累积损失量为100~200ml/kg
C.
扩容后选用3:2:1液500ml静点
D.
补液速度为每小时8~10ml/kg
E.
见尿补钾按0.2%浓度补入