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问题 单项选择题

当使用"多边形工具"，按住（）键就可以使某一边始终保持水平状态：

A.Shift键

B.Command（MaC./Ctrl（Win）键

C.空格键

D.Tab键

答案

参考答案：A

单项选择题

The Japanese Macaca monkey has been studied in the wild for over 50 years. In 1952, on one small Japanese island, scientists dropped some (21) in the dirt for the monkeys. The monkeys liked their taste, but they found the dirt (22) .
One clever 18-month-old monkey found she could (23) the problem by washing the sweet potatoes in a nearby river. She taught this to her mother. Her (24) also learned this new way and they taught their mothers too.
All the younger monkeys (25) learned to wash the dirty sweet potatoes to make them (26) to eat. But many old monkeys found it very hard to learn this and still ate the (27) sweet potatoes.
Then something very strange (28) In the autumn of 1958, scientists found that the monkeys on other nearby (29) began washing their sweet potatoes too. Scientists still don’t fully understand how this knowledge was (30) from one island to another.

Ⅱ. 完形填空

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阅读下面短文，掌握其大意，然后再各题所给的四个选项(A、B、C和D)中选出一个最佳选项。

A．children

B．brothers

C．sisters

D．friends
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单项选择题

临时块流（TBF）是两个无线资源实体所使用的一个物理连接，被用来（）。

A.在分组数据物理信道上传递N-PDU

B.在分组数据物理信道上传递LLC-PDU

C.控制分组数据物理信道的建立，且每个TBF由一个USF标识

D.控制分组数据物理信道的释放，且每个TBF只能对应一条PDCH
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