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【简答题】
证券登记结算机构应当妥善保存登记、托管和结算的原始凭证。重要的原始凭证的保存期不少于（ ）。
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反馈参考答案：
举一反三
【判断题】Some countries set technical trade barriers to limit imports by taking advantage of sophisticated and strict technical regulations & standards and conformity assessment procedures, etc.
A.
正确
B.
错误
【单选题】下列叙述滤过除菌不正确的是
A.
通常用于热不稳定的药品溶液
B.
利用细菌不能通过致密具孔滤材的原理以除去气体或液体中的微生物
C.
一般滤材孔须在0.45μm，可以有效阻挡微生物及芽孢
D.
在同时滤除细菌同时除去一些微粒杂质
【单选题】下列叙述滤过除菌不正确的是
A.
以物理阻留的方法除菌
B.
用于不耐热的低粘度药物溶液的除菌
C.
常用的滤过材料主要有微孔薄膜滤器、垂熔玻璃滤器和沙滤棒
D.
在同时滤除细菌同时除去一些微粒杂质
【判断题】Countries set trade barriers to the imports from other countries mainly to limit imports, to protect their own industries and trade and to damage trade relations with other countries.
A.
正确
B.
错误
【简答题】Bilateral trade has grown 26 times to US $ 134.3 billion in2006 from US $ 5 billion in 1992, the two countries important trade partners of each other. Mutual investment is growing. The ROK had ...
【单选题】If a group of countries abolish trade barriers between them and set the same tariffs on goods coming in from other countries, they are a______.
A.
common market
B.
customs union
C.
federation
D.
free trade area
【单选题】African countries need to a more open trade policy to set up a powerful market.
A.
adopt
B.
deliver
C.
promise
D.
reveal
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