最常见的颅内神经纤维瘤起源于()_听神经瘤_全学科试题题库

当前学科：听神经瘤

题目：单选
最常见的颅内神经纤维瘤起源于()
答案： <查看本题扣1积分>

查看答案

答案不对？请尝试站内搜索

推荐知识点:

二级市场是有价证券在发行人与投资者之间流通的市场( )。

中间冷却器压力下降是何原因？怎样排除？

在处理边坡上及坡顶附近的溶洞，洞内充填物不深时，应予（），用（）回填密实，充填物较深时，应将表层松软部分清除，用（）回填密实；洞口应用厚度约0.5m的（）封闭。

汽车安全环保检测的项目有：汽车（），汽车侧滑量、前大灯光度和角度测量误差、柴油车排放黑烟烟度、汽油车排放污染物、汽车噪声等。

寄往本埠挂号信函一件重329克，应收资费（）元。

Quotas , tariffs and subsidies Like most wars,a trade war may bring about desired economic or political changes, but in the long run almost everyone suffers ,including those whom the trade war was meant to help. An efficient carmaker, for example, may ask for limits of foreign imports, hoping to keep its price high without improving the quality of its products. In the end , however , other countries may retaliate with trade restrictions of their own. Consumers and businesses in both countries are then forced to buy poorly made and expensive domestic products. Trade restrictions might protect a few jobs in inefficient industries,but the whole economy often suffers by becoming less competitive in the international markets. The most common tools for limiting imports of foreign goods and services are quotas, tariffs,and subsidies. When a country imposes a quota, it limits the quantity of certain foreign products that can be imported. A tariff is a tax placed on goods entering a country , raising the price of imported goods. A government can also use the taxpayers' money to provide a subsidy to local producers , making the price of local goods artificially lower than imported goods. Trade barriers, like walls between feuding neighbors, are usually imposed unilaterally by one country acting on its own to limit the amount of foreign products available to local producer from foreign competition and allow them time to improve their products or lower their prices as long as they are protected from foreign competition by trade barriers. Although trade restrictions are of dubious economic value, they have been shown to be effective in bringing about political or social change. The refusal of countries to trade and do business with South Africa, for example, was widely seen to be responsible for the decision to dismantle the system of apartheid. Trade blockades can be useful in forcing countries to change policies that violate human rights or international treaties, but as long as a sufficient number of countries join in the blockade to make it effective. Questions for reading :

如何理解计量器具的重复性？

能同时显示髓鞘和尼氏小体的染色方法是（）。

下列不能控制艾滋病的措施是（）

男，50岁。常有上腹隐痛不适10余年，近1年症状加重，胃纳欠佳。胃镜：胃角0.5cmX0.8cm溃疡，幽门螺杆菌（+）。为了鉴别胃溃疡的良、恶性，应采用下列哪一种检查（）