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【简答题】
活塞运动时克服负载 F=1200N ,活塞面积 A 1 =1 5×10 -4 m 2 ,溢流阀调定压力为 p y =4.5MPa ,两个减压阀的调定压力分别为 p j1 =3MPa , p j2 =1 MPa 。两个减压阀非工作状态时的压力损失均为 0.2 MPa 。不计管路损失,试确定活塞停止在终端位置时 A 、 B 、 C 三点压力。(只写结果即可单位是兆帕,无需写单位)
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【简答题】Free Trade Area
【简答题】自由贸易区(free trade area)
【单选题】The main difference between a free trade area and a customs union is that the members of a customs union ________.
A.
agree to the free movement of all factors of production
B.
harmonize their tax, monetary, and fiscal policies and create a common currency
C.
agree to treat trade with all nonmember nations in a similar manner
D.
accept a common stance on economic and political policies regarding nonmember nations
【单选题】What is the difference between Free Trade Area and Customs Union?
A.
Free trade among members.
B.
FTA asks all the members to negotiate for a common external trade policy.
C.
External trade policy towards non-member countries.
D.
FTA is more popular than Customs Union.
【单选题】Trade diversion refers to trade diverted due to _________________, occurs when low-cost foreign suppliers outside a free trade area are replaced by high-cost foreign suppliers in a free trade area.
A.
globalization of markets
B.
globalization of production
C.
regional economic integration
D.
foreign direct investment
【单选题】When the formation of a free trade area results in the reduction of trade with nonmember nations in favor of member countries, ____ occurs.
A.
Trade devaluation
B.
Trade revaluation
C.
Trade creation
D.
Trade diversion
【简答题】有一个帐号my不上心被管理员删除了,但是这个帐号的根目录与相关邮件都还存在,该如何重建此用户呢? (1)查看原用户my的家目录,查看所保留的UID和GID,命令为: 1 ; (2)假设在上题中可知my帐号的UID是1010,GID是1030,则此时新建用户组my,指定GID号,可使用的命令为: 2 ; (3)最后重建my用户,指定UID号,设置my为主群组,命令为: 3 。
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