问题
单项选择题
过敏反应时组织水肿的原因是
A．血浆胶体渗透压降低
B．毛细血管血压升高
C．组织液胶体渗透压降低
D．组织液静水压降低
E．毛细血管壁通透性增加
答案
参考答案：E
解析：[解题思路] 右心衰竭时，右心室射血力量显著减弱，心舒期右心室压力增高，血液淤积在右心房和大静脉内，因此，中心静脉压升高，引起毛细血管血压升高，组织水肿。
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过敏反应时组织水肿的原因是
A．血浆胶体渗透压降低
B．毛细血管血压升高
C．组织液胶体渗透压降低
D．组织液静水压降低
E．毛细血管壁通透性增加
参考答案：E
解析：[解题思路] 右心衰竭时，右心室射血力量显著减弱，心舒期右心室压力增高，血液淤积在右心房和大静脉内，因此，中心静脉压升高，引起毛细血管血压升高，组织水肿。
Passage 3
| Questions 11 to 15 are based on the following passage: To us it seems so natural to put up an umbrella to keep the water off when it rains. But actually the umbrella was not invented as protection against rain. It was first used as a shade against the sun. Nobody knows who first invented it, but the umbrella was used in very ancient times. Probably the first to use it were the Chinese, way back in the eleventh century B.C.. We know that the umbrella was also used in ancient Egypt and Babylon as a sunshade. And there was a strange thing connected with its use; it became a symbol of honor and authority. In the Far East in ancient times, the umbrella was allowed to be used only by royal people or by those in high office. In Europe, the Greeks were the first to use the umbrella as a sunshade. And the umbrella was in common use in ancient Greece. But it is believed that the first persons in Eu- rope to use the umbrellas as protection against the rain were the ancient Romans. During the Middle Ages, the use of the umbrella practically disappeared. Then it appeared again in Italy in the 16th century. And again it became a symbol of power and author-ity. Umbrellas have not changed much in style during all this time, though they have become much lighter in weight. (80) It wasn’t until the twentieth century that women’s um-brellas began to be made in a variety of colors. |
According to the passage, which of the following is NOT true
A．Women enjoy using umbrella with various kinds of colors
B．The inventor of the umbrella is unknown
C．Once ordinary people had no right to use umbrellas
D．Umbrellas were popular and cheap in the ancient times