治疗血友病甲最有效的是应用哪种药物（） A.库存全血 B.清蛋白 C.维生素K1 D

下表是五种银盐的溶度积常数(25℃)，下列有关说法错误的是

A．五种物质在常温下溶解度最大的是Ag₂SO₄

B．将AgCl溶解于水后，向其中加入Na₂S，则可以生成黑色的Ag₂S沉淀

C．沉淀溶解平衡的建立是有条件的，外界条件改变时，平衡也会发生移动

D．常温下，AgCl、AgBr和AgI三种物质的溶解度随着氯、溴、碘的顺序逐渐增大

当主管税务机关确认购货方在真实交易中取得的供货方虚开的增值税专用发票属于善意取得时，符合规定的处理方法是（ ）。

A．对购货方不以偷税论处，并依法准予抵扣进项税款

B．对购货方不以偷税论处，但应按有关规定不予抵扣进项税款

C．购货方不能够重新从销售方取得合法、有效专用发票的，以偷税论

D．购货方能够重新从销售方取得合法、有效专用发票的，罚款后予以抵扣进项税款

《建设工程监理合同（示范文本）》（GF-2012-0202）的附录A是用来明确约定（）的。

A．相关服务工作内容和范围 

B．项目监理机构改人员及其职责 

C．项目监理设备配置数量和时间 

D．监理服务酬金及支付时间

货币证券主要包括（）。

A.商业证券

B.银行证券

C.资本证券

D.政府证券

Networks can be interconnected by different devices. In the physical layer, networks can be connected by (41) or hubs, which just move the bits from one network to an identical network. One layer up we find bridges and switches, which operate at data link layer. They can accept (42) , examine the MAC address, and forward the frames to a different network while doing minor protocol translation in the process. In the network layer, we have routers that can connect two networks. If two networks have (43) network layer, the router may be able to translate between the packet formats. In the transport layer we find transport gateway, which can interface between two transport connections. Finally, in the application layer, application gateways translate message (44) . As an example, gateways between Internet E-mail and X.400 E-mail must (45) the E-mail message and change various header fields.

A．special

B．dependent

C．similar

D．dissimilar