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背景：某汽车模具厂厂房工程，建筑面积6000m2，地上两层，首层层高13m，二层3.6m。独立柱基础，现浇混凝土框架结构，首层结构柱一次浇筑。工期300日历天，由于工期紧张，现场需要多点交叉施工。施工过程中发生了如下事件：事件一：首层施工前，项目部组织了脚手架、平台、梯子等安全设置的检查。监理单位认为检查的安全设置缺项，要求重新检查。事件二：设备安装过程中，项目部使用钢管和扣件临时搭设了一移动平台用于设备安装作业，该平台高6m，台面面积15m2。问题： 首层混凝土浇筑作业人员属于高处作业的哪一级高处作业分级标准内容有哪些
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Birth, marriage and death:these are the greatest events in human life. Many things, good and bad, can happen to us in our lives. Yet there are three days which are usually marked by some kind of special ceremony: the day we are bom ;the day we get married and the day we die. These are the three main events in life. We only have a choice in the second of these: we can choose whether or not to marry. But we have no choice in birth and death. All human beings-- from the most primitive to the most sophisticated--are affected by these three events. The only thing that differs in each society is the way these events are celebrated. Yet all societies share com- mon characteristics. Birth is a time of joy. The proud parents receive congratulations and presents on behalf of the new-born. Marriage is also a time of joy. The young couple go through a special wedding ceremony and receive presents to help them set up their home. Death is a time of sorrow and is marked by a special ceremony and mourning. The dates of all three events are usually remembered. These three events __________all human beings.
We all know that it is possible for ordinary people to make their homes on the equator (赤道), although often they may feel uncomfortably hot there. Millions do it. But as for the North Pole (北极)—— we know that it is not only a dangerously cold place, but that people like you and I would find it quite impossible to live there. At the present time only the scientists and explorers can do so, and they use special equipment. Men have been travelling across and around the e-quator on wheels, on their feet or in ships for thousands of years; but only a few men, with great difficulty and in very recent time, have ever crossed the ice to the North Pole. So it may surprise you to learn that, when traveling by air, it is really safer to fly over the North Pole than over the e-quator. Of course, it is not true about landings in the polar region, but the weather, if we are fly-ing at a height of 5,000 meters above the Pole is a delight. At 4,000 meters and move above the earth you can always be sure that you will not see a cloud in the sky as far as your eyes can reach.In the tropics ( 热带), on the other hand, you are not certain to keep clear of bad weather even at such heights as 18,000 or 20,000 meters.Aeroplanes can’ t climb as high or as quickly in cold air as in warm. Nor can clouds. In practice, this is an advantage to the aeroplane, which is already at a good height when it reaches the polar region and so does not to climb, while at the same time cold air keeps the clouds down low. It is a delight to fly at the Pole because there__________.
We all know that it is possible for ordinary people to make their homes on the equator (赤道), although often they may feel uncomfortably hot there. Millions do it. But as for the North Pole (北极)—— we know that it is not only a dangerously cold place, but that people like you and I would find it quite impossible to live there. At the present time only the scientists and explorers can do so, and they use special equipment. Men have been travelling across and around the e-quator on wheels, on their feet or in ships for thousands of years; but only a few men, with great difficulty and in very recent time, have ever crossed the ice to the North Pole. So it may surprise you to learn that, when traveling by air, it is really safer to fly over the North Pole than over the e-quator. Of course, it is not true about landings in the polar region, but the weather, if we are fly-ing at a height of 5,000 meters above the Pole is a delight. At 4,000 meters and move above the earth you can always be sure that you will not see a cloud in the sky as far as your eyes can reach.In the tropics ( 热带), on the other hand, you are not certain to keep clear of bad weather even at such heights as 18,000 or 20,000 meters.Aeroplanes can’ t climb as high or as quickly in cold air as in warm. Nor can clouds. In practice, this is an advantage to the aeroplane, which is already at a good height when it reaches the polar region and so does not to climb, while at the same time cold air keeps the clouds down low. Aeroplanes usually do not need to climb quickly or fly high in the polar region because__________.
Speaker A:Tom,why don’t you come and have the picnic with us Speaker B :__________
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