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问题 单项选择题

王老师打算运用“40%的平时表现+60%的期末测试”来评价学生的学期成绩，王老师运用的教学评价方式是（）

A.形成性评价+绝对评价

B.相对评价+绝对评价

C.定性评价+定量评价

D.形成性评价+总结性评价

答案

参考答案：D

单项选择题

Networks can be interconnected by different devices．In the physical layer，networks can be connected by (64) or Hubs, which just move the bits from one network to an identical net-work. One layer up we find bridgas and swiehes, which operate at data link layer. They can accept (65) , 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 netwoks. If two networks have (66) 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 the two transport connections. Finally, in the application layer, application gateways translate message

(67) . As an example, gateways between Internet e-mail and X.400 e-mail must (68) the e-mail message and change various header fields.

66（）

A．special

B．dependent

C．similar

D．dissimilar
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单项选择题

不属于低压辅助绝缘安全用具是（）。

A.绝缘手套

B.绝缘台

C.绝缘靴

D.绝缘垫
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