问题
单项选择题
DIC最基本的病变特征是（）
A.出血及脏器功能障碍
B.凝血功能障碍
C.大量微血栓形成
D.凝血物质大量消耗
E.纤溶过程亢进
答案
参考答案：B
解析：DIC是指在某些致病因素作用下，机体凝血系统被激活，大量可溶性促凝物质入血，而引起的以凝血功能障碍为主要特征的病理过程
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DIC最基本的病变特征是（）
A.出血及脏器功能障碍
B.凝血功能障碍
C.大量微血栓形成
D.凝血物质大量消耗
E.纤溶过程亢进
参考答案：B
解析：DIC是指在某些致病因素作用下，机体凝血系统被激活，大量可溶性促凝物质入血，而引起的以凝血功能障碍为主要特征的病理过程
| 从方框内选择适当的单词并用其正确形式完成句子 | |
2. They can't be twins because they look __________. 3. He preferred __________ after his naughty son rather than go shopping. 4. Her mother made her __________ some reading every day during the summer holidays. 5. It's not surprising that everyone has their __________ character. 6. The book tells people how to choose the right __________ shoes. 7. You know, the number of those big name companies __________ very small. 8. Zhang Yimou is a __________ director (导演) in China. |
| 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. |
The underlined word "themselves" in Paragraph 1 refers to ______.
A．plant physiologists
B．solutions
C．laboratory flasks
D．roots