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脊髓梗死的临床表现有哪些?

答案

参考答案:

脊髓梗死的临床表现:急性起病,表现为脊髓某局部损害的症状和体征。由于闭塞的供血动脉不同可表现为:①脊髓前动脉综合征:以脊髓中胸段或下颈段多见,病灶水平的相应部位发生急性神经根痛。短时间内出现截瘫或四肢瘫,病变水平以下痛、温觉丧失而深感觉保留,大小便功能障碍。②脊髓后动脉综合征:脊髓后动脉供应区缺血很少见,临床表现为急性神经根痛,病变水平以下同侧肢体深感觉缺失和感觉性共济失调,痛、温觉及肌力均保存,括约肌功能常正常,故有良好侧支循环,症状常轻而恢复较快。③中央动脉综合征:病变水平相应节段的下运动神经元性瘫痪,多无感觉障碍和锥体束损害症状。

阅读理解

阅读理解。

     Plants are very important living things. Life could not go if there were no plants. This is because plants

can make food from air, water and sunlight. Animals and man cannot make food from air, water and sunlight.

Animals get their food by eating plants and other animals. So animals and man need plants in order to live.

This is why we find that there are so many plants around us.

      If you look carefully at the plants around you, you will find that there are two kinds of plants: flowering

plants and non-flowering plants.

     Flowering plants can make seeds. The seeds are protected by the fruits. Some fruits have one seed, some

have two, three or four, and some have many seeds. But a few fruits have no seeds at all. An example of a

fruit without seeds is the banana fruit.

     Most non-flowering plants don't grow from seeds. They grow from spores. Spores are so small and light

that they can float in the air. We may say that spores are quite the same as the seeds. When these spores fall

on wet and shady places, they usually grow into new plants.

1. The main idea of the passage is that ______.

A. plants are important for life

B. plants cannot grow without air

C. there are many plants around us

D. we cannot live without water

2. Which of the following is NOT TRUE?

A. Plants can be divided into main types: flowering plants and non-flowering plants.

B. All fruits have seeds in them.

C. Seeds are protected by the fruits.

D. Some plants grow from spores.

3. The word "non-flowering" in this passage means _______.

A. 开花的

B. 有花的

C. 多花的

D. 不开花的

4. In "shady places" there is _______.

A. a lot of sunshine

B. a lot of water

C. no water

D. little sunshine

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