关于菌痢的病理改变正确的是 () A.黏膜充血、水肿、中性粒细胞和巨噬细胞浸润 B.

题型:多项选择题

问题:

关于菌痢的病理改变正确的是 ()

A.黏膜充血、水肿、中性粒细胞和巨噬细胞浸润

B.粘膜下层、肌层、浆膜层有明显的炎症反应

C.假膜主要为纤维素、坏死的肠粘膜、细菌、嗜中性粒细胞及红细胞等,部分有脱落

D.整个肠粘膜有假膜覆盖,粘膜上皮及腺体大片消失

E.大约一周左右,假膜开始脱落,形成大小不等,形状不一的“地图状”溃疡如图

考点:住院医师公共科目临床药理学与传染病学广东住院医师临床药理学与传染病学模拟试卷四
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International free trade occurs when there are no barriers to trade. Countries can get a lot of benefits from free trade. (31) , all countries choose to adopt protection policies to some extent In this essay, I will give (32) of the arguments in favour of world free trade, describe the methods for the trade protection policies (33) countries erect to protect domestic industries and give the arguments which can be put (34) to justify protectionist policies.
Tariffs are taxes on (35) products. Sometimes, tariffs are known (36) imports duties and customs duties. They can be used (37) raise revenue. But, they are usually used to (38) imports and also to help domestic producers. The effect of imposing (39) tariff is to raise price for domestic consumers, and some consumers will switch consumption (40) imported goods to domestically produced substitutes. (41) are two types of tariffs. One is percentage taxes, it is based on
percentage of value of goods. (42) one is specific (fixed sum taxes), it is based on a fixed tax (43) unit or weight. Quota is a limit on the supply of goods or services. It can be imposed on exports. The domestic market share will increase because of (44) a limit on the quantity of imported goods. However, the price of protected goods will also rise because a quota is to reduce supply. Voluntary export restraint or restriction (45) similar to a quota, but this time the limit on imports arises from a voluntary agreement (46) the exporting and importing countries. For example, the UK had an agreement with Japanese car (47) that they should not take (48) than 10 percent of the UK car market. Exchange control means that a government control on foreign currency controls importers access to foreign currency. This is a (49) which was used by a number of European countries, (50) the UK, in the 1960s and 1970s and is still found in some developing countries.

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若双曲线x2 / 4-y2 / b2="1" (b>0) 的渐近线方程为y=±1/2 x ,则b等于         .

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开放性气胸的特点是()

A.胸腔内有气体

B.呼吸时空气经伤口自由出入

C.呼吸困难

D.肺萎缩

E.纵膈移位

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既反映地物的平面位置,又反映地面高低起伏状态的正射投影图称为()。

A.平面图

B.断面图

C.影像图

D.地形图

题型:多项选择题

男性成人体液总量约占体重的()

A.20%

B.30%

C.40%

D.50%

E.60%

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