端部接合的红柳桉木板材

Network managers have long awaited practical voice-over-IP (VOIP) solutions. VOIP promises ease network management and decreases (66) by converging a company’s telephony and data infrastructures into one network. And a VOIP solution implemented at a company’s head-quarters with far-reaching branch offices can (67) tremendous amounts of money in long distance phone bills, provided that solution delivers POTS-like voice (68) over the Internet.
VOIP gateways are designed to convert voice from the (69) domain to the circuit switched domain. VOIP solutions use a digital signal processor (DSP) to process the voice data, preparing the voice sample for transmission by compressing voice and removing jitter. The VOIP equipment must comply with the (70) H.323 standard defined by the International Telecommunication Union, or ITU.

A．framing

B．message

C．circuit

D．packet

东汉书法家刘德昇，教出了钟繇和（）两位著名书法家。

根据括号内所给汉语写出单词的适当形式。

1.They'll have        ( 猪肉)with carrots tonight. 

2.Sandy likes eating        ( 西红柿)with eggs. 

3.Eating much        ( 水果)is good for us. 

4.I'm thirsty.I want something to        ( 喝). 

5.What's your        ( 最喜欢的)food? 

6.       ( 汉堡包)are the most popular in America. 

7.Don't eat too much        ( 糖果).It's bad for your teeth. 

8.Ice cream and candy are not        ( 健康的)food. 

9.Potato is one of        ( 蔬菜).We can eat a lot. 

10.We often put the food into the        ( 冰箱)in summer. 

孙某，苯丙酸诺龙25mg im biw，biw的中文译意是

A．一天3次

B．一天2次

C．每周2次

D．每周1次

E．四小时1次

化简

（1）6xy-10x²-5yx+7x²

（2）（3x²-2）-3（4x²-2x-3）+2（2x²-1）

（3）先化简，再求值：3x²y-[2x²y-3（2xy-x²y）-xy]，其中x=-1，y=-2．