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【单选题】
共有 4 个用户进行 CDMA 通信。这 4 个用户的码片序列为:A.
(–1 –1 –1 +1 +1 –1 +1 +1) ;
B.
(–1 –1 +1 –1 +1 +1 +1 –1)
C.
(–1 +1 –1 +1 +1 +1 –1 –1) ;
D.
(–1 +1 –1 –1 –1 –1 +1 –1) 现收到码片序列: (–1 +1 –3 +1 –1 –3 +1 +1) 。问是哪些用户发送了数据?发送的是 1 还是 0 ?
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反馈参考答案：
举一反三
【单选题】“A” class divisions are those divisions formed by bulkheads and decks and are so constructed as to be capable [ˈkeɪpəbl] of preventing the passage of smoke and flame to the end of ______standard fir...
A.
0.5 hours
B.
1 hour
C.
1.5hours
D.
2 hours
【简答题】下列选项中抗凝血酶Ⅲ(AT-Ⅲ)活性减低的是
【简答题】I. 看音标写出单词及其中文意思。 (提示:直接写答案,不用写序号, 英文和中文间不用空格, 否则识别不出来正确答案) 1. /θrə ʊ t/ 2. /k ɒ f/ 3. /s ɔ :/ 4. /f ʊ t/ 5./ˈfiːvə(r)/ 6./'tr ʌ bl/ 7./h ɜ :t/ 8./'stʌməkeɪk/
【简答题】[bri:d]种类 [seɪk]目的 [ˈlɪtərəli]确实地 [ˈkeɪbl]电缆 [rɪˈfɔ:m]改革
【单选题】The officer in charge of the navigational watch shall not hand over the watch to the relieving officer if ______.
A.
there is a reason to believe that the latter is not capable [ˈkeɪpəbl] of carrying out the watch keeping duties
B.
the ship is fitted with automatic steering
C.
there is daylight or darkness
D.
at no time shall the bridge be left unattended
【简答题】[ ˈ ke ɪ bl] __________________________
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