An internet is a combination of networks connected by (1). W

【名词&注释】

多普勒(doppler)、路由器(router)、数据包(packet)、会计科目(account)、目的地(destination)、网络连接(network connection)、三尖瓣(tricuspid valve)、是什么(what is)、肺动脉瓣(pulmonary valve)

[单选题]An internet is a combination of networks connected by (1). When a datagram goes from a source to a (2), it will probably pass many (3) until it reaches the router attached to the destination network. A router receives a (4) from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? The decision is based on optimization: Which of the available (5) is the optimum pathway?

A. D

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[多选题]总账系统启用日期在（）后不能修改。

A. 增加会计科目
B. 录入外币汇率
C. 录入期初余额
D. 录入记账凭证
E. 新年度进入系统

[单选题]正常人群中，多普勒超声显示的血流速度受呼吸运动影响最大的是（）

A. 上、下腔静脉
B. 左、右肺静脉
C. 二尖瓣口
D. 三尖瓣^{(tricuspid valve)}口
E. 肺动脉瓣^{(pulmonary valve)}口

[单选题]患者看见护士的鼻子突然变大并呈绿色，是什么^{(what is)}症状（）

A. 幻觉
B. 妄想
C. 错觉
D. 感知觉综合障碍

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