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[主观题]
根据材料回答 74～76 题： 1岁婴儿常出现睡眠不安、好哭、易出汗等现象，可见方形颅，长到l岁半时，
根据材料回答 74～76 题：
1岁婴儿常出现睡眠不安、好哭、易出汗等现象，可见方形颅，长到l岁半时，两腿向内弯曲成“X”型。
第 74 题 从营养学考虑，可能缺乏下列哪种营养素
A．维生素A
B．维生素B
C．维生素C
D．维生素D
E．维生素E
提问人：网友liufangbj
发布时间：2022-01-06
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更多“根据材料回答 74～76 题： 1岁婴儿常出现睡眠不安、好哭…”相关的问题
第1题
In der BRD besitzen ca. zwei Prozent der privaten Haushalte 70 Prozent des gesamten Betriebs und Kapitalvermögens; 98 Prozent der Haushalte dagegen besitzen lediglich 30 Prozent aller Vermögenswerte.
第2题
Each advance in microscopic technique has provided scientists with new perspectives on the function of living organisms and the nature of matter itself. The invention of the visible-light microscope late in the sixteenth century introduced a previously unknown realm of single celled plants and animals. In the twentieth century, electron microscope have provided direct views of viruses and minuscule surface structures. Now another type of microscope, one that utilizes X rays rather than light or electrons, offers a different way of examining tiny de tails; it should extend human perception still farther into the natural world.
The dream of building an X-ray microscope dates to 1895; its development, however, was virtually halted in the 1940's because the development of the electron microscope was progressing rapidly. During the 1940's, electron microscopes routinely achieved resolution better than that possible with a visible-light microscope, while the performance of X-ray microscopes resisted improvement. In recent years, however, interest in X-ray microscopes has revived, largely because of advances such as the development of new sources of X-ray illumination. As a result, the brightness available today is millions, of times that of X-ray tubes, which, for most of the century, were the only avail able sources of soft X-rays.
The new X-ray microscopes considerably improve on the resolution provided by optical microscopes. They can also be used to map the distribution of certain chemical elements. Some can form. pictures in extremely short times; others hold the promise of special capabilities such as three-dimensional imaging. Unlike conventional electron microscopy, X-ray microscopy enables specimens to be kept in air and in water, which means that biological samples can be studied under conditions similar to their natural state. The illumination used, so-called soft X rays in the wavelength range of twenty to forty angstroms (an angstrom is one ten-billionth of a meter), is also sufficiently penetrating to, image intact biological cells in many cases. Because of the wavelength of the X rays used, soft X-ray microscopes will never match the highest resolution possible with electron microscopes. Rather, their special properties will make possible investigations that will complement those performed with light-and-electron-based instruments.
What does the passage mainly discuss？
A．The detail seen through a microscope.
B．Sources of illumination for microscopes.
C．A new kind of microscope.
D．Outdated microscopic techniques.
第3题
阅读理解。????Have you ever imagined what the world...
| 阅读理解。 |
| Have you ever imagined what the world will be like in the near future？ A recent study shows that the world in 2100 will be more crowded, more polluted and less stable ecologically than the world we live in now. Visible ahead is serious stress involving population, resource and environment. Despite greater food output, people in the world will be poorer in many ways than they are today. For hundreds of millions of the extremely poor, the outlook for food and other necessities of life will be no better, for many it will be worse. While the economies of the developing countries are expected to grow at a faster rate than those of the industrialized nation, the total national product per head in most less developed countries remains low. The existing gap between the rich and poor nations will further widen. World food production is estimated to increase by 90 percent from 2000 to 2100. Most of that increase goes to the countries that already have relative higher per-head food consumption. Mean-while, per-head consumption of food in the developing countries will scarcely improve or will actually fall far below the present inadequate level. What is worse is that prices for food are expected to double. As a result, many less developed countries will have increasing difficulties meeting energy needs. For the one quarter of mankind that depends primarily on wood for fuel, the outlook is not hopeful. Regional water shortage will become more severe. In the 1970-2100 period population growth will require twice as much water as it does today in nearly half the world. Still greater increases would be needed to improve standards of living. Development of new water supply will become more costly. |
| 1. According to the passage, in 2100 although output of food will be greater, _____. |
| A. people will have sufficient food supplies B. the resource will become more than enough C. in most developing countries people will have less food than they have today D. the living standards of the world's population will improve greatly |
| 2. According to the author, in 2100 for many poor people, _____. |
| A. things will get even worse B. things will be a little better C. it will be necessary for them to improve their housing D. it will be impossible to obtain enough necessities of life |
| 3. In the 2000-2100 period, the large proportion of global increase of food production goes _____. |
| A. to 90 percent as estimated B. to any country in the world that needs it C. to developing countries D. to those countries that already have high per-head consumption |
| 4. The passage is mainly concerned about _____. |
| A. the future problems in the world B. water and air pollution C. water and food shortages D. food production and consumption |
第4题
某柱下独立基础的底面尺寸为1.6m×2.4m。上部结构传至基础顶面的荷载准永久组合值Fk＝600kN，基础埋深d＝2.0m，其余如下图所示。
确定地基变形计算深度zn最接近于（）m。
A. 3.70
B. 3.90
C. 4.12
D. 5.20
第5题
根据材料回答 39～40 题：
A．活动性肺结核患者
B．痰涂片阳性肺结核患者
C．肺结核原发性感染者 $amp;>amp;>amp;>amp;>amp;$gt;
D．潜隐感染结核患者
E．儿童肺结核患者
第 39 题 以上哪类患者不是肺结核传染源
第7题
根据材料回答 45～48 题：
A．散发
B．暴发
C．流行 $amp;>amp;>amp;>amp;>amp;$gt;
D．大流行
E．大暴发
第 45 题 发病率呈历年的一般水平，各病例间在发病时间和地点方面无明显联系
第8题
根据材料回答 52～53 题：
A．随访5年尚存活的病例数÷随访5年的总病例数×100%
B．对照组的死亡(发病)率÷实验组的死亡(发病)率×100%
C．[对照组的死亡(发病)率-实验组的死亡(发病)率]÷对照组的死亡(发病)率×100%
D．治疗好转的例数÷治疗的总例数×100%
E．治愈人数÷治疗的总例数×100%
第 52 题 效果指数为
