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问题 多项选择题

某双频网（使用不同位置区）实际话统中发现存在大量位置更新现象，请选择可能的原因。（）

A、周期性位置更新设置太小

B、切换参数设置不当引起大量双频切换

C、1800基站覆盖较差

D、最小接入电平设置过高

答案

参考答案：A, B, C

选择题

如果利用如图所示的电路来测量一个大电阻R的电功率，那么x、y、z应分别代表（　　）

A．电流表、电压表、滑动变阻器

B．电压表、电流表、滑动变阻器

C．滑动变阻器、电流表、电压表

D．电压表、滑动变阻器、电流表
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听力题

缺词填空。（10分）

China is a large country with a long h__小题1:__ . Our ancestors(祖先) created(创造) excellent cultures for us. Once China was the s__小题2:__ country in the world, especially in Tang Dynasty. But for more than one hundred years China has fallen behind other countries for some r__小题3:__. Other countries s__小题4:__ no respect(尊重) to our nation and even invaded(侵犯) China.

H__小题5:__. Chinese people are hard-working and peace-loving. Under the lead of the Communist Party of China. China is now the s__小题6:__ largest country in economy(经济) in the world. In the past 30 years, great changes have t__小题7:__ place in our country. Whenever people ask me a__小题8:__ my feeling of China. I can say proudly, “I’m proud of being a Chinese.” As s__小题9:__ , we should study hard to serve our country. The harder we study, the b__小题10:__ we can serve our country in the future.
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