【名词&注释】
连贯性(coherence)、贵金属、金属元素(metal elements)、定义域(domain)、铜合金(copper alloy)、胶体渗透压(colloid osmotic pressure)、肾小球(glomerular)、不符合(inconformity)、血浆晶体渗透压(crystalloid osmotic pressure)、光怪陆离
[单选题]选用下面的句子为文段填空,排列顺序正确的一项是 ( )湖上也好,山上也好,天空中也好, , , ;到处都在动,都是不均衡,是离奇变幻,是光怪陆离的阴影和线条的无穷的混合和错综,而万物之中却隐藏着宁静、柔和、统一和美的必然性。①没有一丝完整的线条②没有一个同样的瞬间 ③没有一片完整的色彩
A. ①②③
B. ①③②
C. ②①③
D. ②③①
根据以下内容,回答下面的题目。The energy which the sun radiates goes in every direction, and only a minute part of it falls on the earth.Even so, it represents power of about 5,000,000 horsepower (马力) per square mile per day; the sun gives us as much energy every miunte as mankind utilizes in a year.At present, we use this energy indirectly, and it is our final source of power.Coal represents the chemical action of the sun on green plants thousands of years ago.Water power results from the rain formed by vapor which comes from the evaporation of water under the sunshine.Even windmills operate because of air currents set in motion by the different heating affects of the sun in different places.Some day, through chemistry or some type of solar engine, we shall harness this great source of energy more directly.Already a scientist has worked out an engine, surprisingly efficient, in which the sun’s rays are concentrated through mirrors on a tube of water to create steam.How much energy given off by the sun reaches the earth?
根据材料,回答下面的题目。金是一种具有美丽光泽的贵金属,是人类最早应用的金属之一。金最大的特点是不易氧化,即使在千度高温下也不变色,因此获了“真金不怕火炼”的美誉。在世界上,绝对的纯金是没有的,一般工业用金也不过为99.99%左右。可见“金无足赤”不无科学道理。通常人们所说的纯金(也有称之为赤金、足金的),纯度约在99%。由于纯金的硬度低、塑性好,用它制成的首饰不耐磨,易变形,所以近代很少用纯度很高的金来制作首饰,而是将它配制成K金后再使用。K金是金与其他金属熔合而形成的金基合金。常用于首饰生产的有金铜合金和金银合金。金铜合金微呈紫红;金银合金则略显淡黄;为此,K金首饰在成品之前一般均进行镀金处理。另外,若在金中加入其他金属元素,还可以制成青色、蓝色和红色等各种颜色的K金饰品。K金按其成色高低分为24K,即24成。24K金为纯金,成色最高。l8K金,则说明该合金中含金18成,其他金属占6成。K金首饰的含金量百分比为:8K——33.3%;9K——37.55%;10K——41.7%;l2K——50%;l4K——58.5%;l8K——75%;20K——83.4%;22K——91.67%。目前,在国外K金首饰很流行。英国盛行9K金,美国和西欧则喜欢l4K金,香港最喜欢l8K金首饰。纯金的比重为l9.3,是钢铁的2.5倍。一寸见方的金块约重700克左右,即超过一市斤。下列对纯金的表述,不符合(inconformity)文意的一项是 ( )