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【单选题】
经营国内旅游业务和入境旅游业务的旅行社应当存入质量保证金()万人民币;经营出境旅游业务的旅行社,应当存入质量保证金( )万元人民币。A.
20;140
B.
50;120
C.
50;100
D.
20;50
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【单选题】How many parties are involved in a draft for the payment against a letter of credit? ( )
A.
Three. They are drawer, drawee and payee.
B.
Two. They are drawer and drawee.
C.
Three. They are issuer, presenter and payee.
D.
Four. They are drawer, drawee, payer and payee.
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【单选题】How many parties are involved in a draft for the payment against a letter of credit? ( )
A.
Two. They are drawer and drawee.
B.
Three. They are drawer, drawee and payee.
C.
Three. They are issuer, presenter and payee.
D.
Four. They are drawer, drawee, payer and payee.
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【单选题】以下说法正确的是( )。
A.
利用手动操纵式的仿形装置，依靠操作者细心操作，劳动强度高
B.
利用弹簧弹力的仿形装置适用于模型轮廓面离中心固定点变化较大的场合
C.
利用重物重力的仿形装置在加工时，容易调节压力的大小
D.
利用液压装置的仿形装置，结构比较简单，造价低
【单选题】路由器R通过以太网交换机S和S2连接两个网络,R的接口、主机H和H2的IP地址与MAC地址如下图所示。若H向H2发送1个IP分组P,则H发出的封装P的以太网帧的目的MAC地址、H2收到的封装P的以太网帧的源MAC地址分别是
A.
00-a1-b2-c3-d4-62,00-1a-2b-3c-4d-52
B.
00-al-b2-c3-d4-62.00-al-b2-c3-d4-61
C.
00-1a-2b3c-4d-51,00-1a-2b-3c-4d-52
D.
00-1a-2b-3c-4d-51.00-a1-b2-c3-d4-61
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