因特网用户利用电话网接入 ISP 时需要使用调制解调器,其主要作用是______。A

题型:单项选择题

问题:

因特网用户利用电话网接入 ISP 时需要使用调制解调器,其主要作用是______。

A.进行数字信号与模拟信号之间的变换

B.同时传输数字信号和语音信号

C.放大数字信号,中继模拟信号

D.放大模拟信号,中继数字信号

考点:计算机等级考试网络技术全国计算机等级考试三级网络技术真题2006年4月
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阅读理解。

     Good morning. I'm Lin Li. Today is Friday. Now here is the 7: 00 a. m. weather report. Hong

Kong's sunny and hot. Guangzhou's warm. It's raining, too. Shanghai was cool and rainy yesterday.

It's cool and cloudy today. Beijing is very windy. It's cold and dry, too.

1. What day is it today?

A. Sunday     

B. Friday      

C. Tuesday     

D. Monday

2. When is the weather report? It's at _______.

A. 7: 00 a. m.

B. 7: 00 p. m.

C. 2: 00 p. m.

D. 8: 00 a. m

3. What is the weather like in Hong Kong?

A. Sunny and hot            

B. Cool and cloudy  

C. Warm and dry            

D. Rainy and windy

4. Which place is warm and rainy today?

A. Hong Kong        

B. Guangzhou    

C. Shanghai   

D. Beijing

5. Which place is very cold, dry and windy?

A. Guangzhou       

B. Hong Kong    

C. Shanghai    

D. Beijing

题型:单项选择题

f16是f8进光面积的()

A.4倍

B.2倍

C.1/2倍

D.1/4倍

题型:单项选择题

并殖吸虫病的病原治疗药物包括()

A.硫酸二氯酚

B.喹诺酮类

C.吡喹酮

D.氯喹

E.三氯苯达唑

题型:单项选择题

虚热的治疗方法是

A.寒者热之
B.热者寒之
C.阳病治阴
D.阴病治阳
E.调整阴阳

题型:单项选择题

二十八初孕妇,孕33周,自觉乏力、食欲差,伴恶心、呕吐2周,小便深黄色,皮肤瘙痒5日。查体:体温37.5℃,血压130/90mmHg,神志清,皮肤巩膜黄染,躯干及四肢皮肤可见散在出血点,肝肋下未触及,胎头入盆,胎心140次/分。

若ALT542U/L,总胆红素85.5μmol/L,结合胆红素46μmol/L,尿胆红素(+),HBsAg(+),本例最可能的诊断是()

A.妊娠高血压疾病引起的肝损害

B.妊娠剧吐

C.妊娠急性脂肪肝

D.妊娠合并病毒性肝炎

E.妊娠肝内胆汁淤积症

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