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【单选题】
How many steps are there in the SOP?
A.
3
B.
4
C.
2
D.
1
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【判断题】葫芦烙画的装饰独具一格,材质工艺非常讲究。
A.
正确
B.
错误
【单选题】Choose the phrase that is closest in meaning to the underlined part. By applying a digital compression algorithm, resulting in a digitally compressed representation of the original signal, the amount ...
A.
to precisely represent the origin of the PCM samples
B.
to reconstruct the signal initially represented by PCM accurately
C.
to accurately regenerate the original pulses of the modulated samples
D.
to resample the pulse code modulation codes correctly
【多选题】虚拟内存的设置,主要是设置()。
A.
硬盘大小
B.
位置大小
C.
内存大小
D.
分页位置
【单选题】消息认证的内容不包括 ______ 。
A.
证实消息发送者和接收者的真实性
B.
消息内容是否受到偶然或有意的篡改
C.
消息合法性认证
D.
消息的序列和时间
【单选题】In the previous section we discussed sine-wave or CW modulation systems in which the modulating signal _______ of a digital pulse train.
A.
made
B.
consisted
C.
contained
D.
got
【简答题】The most fundamental digital modulation techniques are amplitude-shift keying, frequency-shift keying, and phase-shift keying
【单选题】改善虚拟内存的主要方法是()
A.
增加内存的容量
B.
正确设置虚拟内存
C.
加快页面交换速度
D.
增加物理内存的利用率
【单选题】执行昼间专业任务的航空器,在山区进行作业飞行时,起飞时间不得早于日出______降落不得晚于日落前15分钟
A.
10分钟
B.
15分钟
C.
20分钟
【单选题】企业收到投资方以库存现金投入的资本,实际投入的金额在注册资本中所占份额的部分,应记入( )科目。
A.
“实收资本或股本”
B.
“资本公积”
C.
“盈余公积”
D.
“利润分配”
【单选题】Analog modulation with an optical fiber communication system is()efficient, requiring a far( )signal to noise ratio at the receiver than digital modulation.
A.
less higher
B.
more higher
C.
more lower
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