问题 单项选择题

中国自主研发的3G通信标准是()

A.CDMA2000

B.TD-SCDMA

C.WCDMA

D.WiMAX

答案

参考答案:B

解析:

1985年,ITU提出了对第三代移动通信标准的需求,1996年正式命名为IMT-2000(International MobileTelecommunications-2000),其中的2000有3层含义:

(1)使用的频段在2000mHz附近;

(2)通信速率于约为2000Kb/s(即2Mb/s);

(3)预期在2000年推广商用。

写作题

书面表达

        假如你是Mike,给你的朋友Jack写一封信。

        要求如下:

        1.内容必须包括劝说Jack每天锻炼身体,多吃蔬菜、水果,保证充足的睡眠,少吃垃圾食品。

        2.词数80左右,条理清楚,意思连贯,句式规范,字迹工整。

        3.信的开头和结尾已经给出,不计入总词数。

Dear Jack,

       How are you going? You usually have some problems with your health. Don't worry. Let me give you some advice. 

                                                                                                                                                                

                                                                                                                                                               

       I hope you would take my advice and keep healthy. Good luck!

                                                                                                                                                 Yours,

                                                                                                                                                  Mike

单项选择题