苏轼在欣赏王维的画作时说道：“味摩诘之诗，诗中有画。观摩诘之画，画中有诗。”下列 发布时间：2017-04-13 07:33 │ 来源：www.tikuol.com 题型：选择题 问题： 苏轼在欣赏王维的画作时说道：“味摩诘之诗，诗中有画。观摩诘之画，画中有诗。”下列作品在绘画风格上与之相似的是 A B C D
题型：选择题 已知A、B、C、D和E都是元素周期表中前36号的元素，它们的原子序数依次增大。A与其他4种元素既不在同一周期又不在同一主族。B和C属同一主族，D和E属同一周期，又知E是周期表中1-18列中的第7列元素。D的原子序数比E小5，D跟B可形成离子化合物。 请回答：（1）A元素的名称是____________；（2）B的元素符号是____________，C的元素符号是____________，B与A形成的化合物比C 与A形成的化合物沸点高，其原因是____________（3）E属元素周期表中第________周期，第________族的元素，其元素名称是________，它的+2价离子的电子排布式为：____________（4）D跟B形成的离子化合物的电子式为________________________； 查看答案
题型：选择题 About fifty years ago, plant physiologists set out to grow roots by themselves in solutions in laboratory flasks. The scientists found that the nutrition of isolated roots was quite simple. They required sugar and the usual minerals and vitamins. However, they did not require organic nitrogen compounds. These roots got along fine on mineral inorganic nitrogen. Roots are capable of making their own proteins and other organic compounds. These activities by roots require energy, of course. The process of respiration uses sugar to make the high energy compound ATP, which drives the biochemical reactions. Respiration also requires oxygen. Highly active roots require a good deal of oxygen. The study of isolated roots has provided an understanding of the relationship between shoots and roots in intact plants. The leaves of the shoots provide the roots with sugar and vitamins, and the roots provide the shoots with water and minerals. In addition, roots can provide the shoots with organic nitrogen compounds. This comes in handy for the growth of buds in the early spring when leaves are not yet functioning. Once leaves begin photosynthesizing, they produce protein, but only mature leaves can "export" protein to the rest of the plant in the form of amino acids.Roots have the ability to ______.A．make proteinsB．obtain fresh airC．produce inorganic nitrogenD．carry out activities without energy 查看答案
