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【单选题】
某连续型变量数列,其首组为100以下,若其邻组的组中值为130,则前组的组中值为
A.
70
B.
60
C.
50
D.
80
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【单选题】四等水准测量40、如果水准仪的十字丝横丝和竖轴不垂直,观测时要注意的是()
A.
始终用十字丝的中间部分瞄准尺子上的刻划
B.
始终用十字丝的一端瞄准尺子上的刻划
C.
利用脚螺旋将十字丝横丝调成水平后,再用横丝读数
D.
利用目估横丝应在的水平位置然后读数
【简答题】Write a short composition of about 250 to 300 words on the topic The Advantages of Owning a Business. Write it neatly on ANSWER SHEET.
【简答题】Question 7 Write short notes on: (a) vicarious liability; (b) negce.
【单选题】The Water Festival __________ to be the most important celebration among the Dai People. [     ]
A.
says
B.
is saying
C.
has said
D.
is said
【多选题】Which three statements are true about DAI?()
A.
DAI intercept all ARP packets on untrusted ports
B.
DAI determines the validity of an ARP packet based on the valid MAC address-to-IP address bindings stored in the DHCP Snooping database.
C.
DAI is used to prevent against a DHCP Snooping attack.
D.
DAI forwards all ARP packets received on a trusted interface without any checks.
E.
DAI forwards all ARP packets on untrusted ports.
F.
DAI determines the validity of an ARP packet based on the valid MAC address-to-IP address bindings stored in the CAM table.
【判断题】花镜是在具有一定几何轮廓的种植床内种植颜色形态质地不同的花卉,以体现色彩美或图案美的园林形式。
A.
正确
B.
错误
【多选题】The DAI feature has been implemented in the Company switched LAN.  Which three statements  are true about the dynamic ARP inspection (DAI) feature? ()
A.
DAI can be performed on ingress ports only.
B.
DAI can be performed on both ingress and egress ports.
C.
DAI is supported on access ports, trunk ports, EtherChannel ports, and private VLAN ports.
D.
DAI should be enabled on the root switch for particular VLANs only in order to secure the ARP  caches of hosts in the domain.
E.
DAI should be configured on all access switch ports as untrusted and on all switch ports connected to other switches as trusted.
F.
DAI is supported on access and trunk ports only.
【单选题】用电话拨号上网时,使用的硬件有以下几种: a 、计算机, B 、电话线, C 、 RS-232 电缆, D 、 Modem , e 、电话网,这几种硬件的连接顺序应该是
A.
a-   b-  c-  d-e
B.
a-  c-  d-   b-e
C.
a-  d-e-  c-   b
D.
a-e-  d-  c-   b
【多选题】关于锐捷交换机DAI功能,下列描述正确的是()
A.
DAI功能可以基于vian开启
B.
开启DAI功能后,接口收到的所有ARP报文都会送CPU处理
C.
开启DAI功能后,接口收到的所有目的IP为本机的ARP报文才会送CPU处理
D.
DAI必须和ip source guard一起使用,才能有效的防止arp欺骗
【简答题】Write a short essay entitled Fast Food and Traditional Chinese Cooking. You should write at least 120 words following the outline given below: 1.很多人越来越喜欢西式快餐,如麦当劳(McDonald)、肯德基(KFC)。 2.你更喜欢西式快餐还是传统的中餐...
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