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【单选题】
无线电波按频率(或波长)可分成中波、短波、超短波和微波。下列关于微波的说法错误的是()。
A.
微波沿地球表面传播,易穿过建筑物
B.
微波是一种具有极高频率的电磁波,其波长很短
C.
微波通信的建设费用低(与电缆通信相比):抗灾能力强
D.
微波传输技术广泛用于移动通信和数字高清晰度电视的信号传输等
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举一反三
【单选题】实现从ip地址到以太网MAC地址转换的命令为()
A.
ping
B.
ifconfig
C.
arp
D.
traceroute
查看完整题目与答案
【判断题】I. Tell whether the flowing statements are true or false I.one of the objective of quantity purchase discounts and forward buys. 2.B a s i cally warehousing has thee functions: movement ,storage, and ...
A.
正确
B.
错误
查看完整题目与答案
【单选题】关于数据，下列说法正确的是:
A.
数据就是数学中的数，包括整数、实数等。
B.
在计算机中数据可以采用二进制、八进制、十六进制存储。
C.
数据可分为数值型、文本型等不同的数据类型，数值型数据采用补码表示，文本型采用字符编码。
D.
同样的数据在内存储器和外存储器中的占用的存储空间大小一定不同。
查看完整题目与答案
【简答题】Questions 3 and 4 are based on the news report you have just heard. 3. A) He is a queen bee specialist. B) He works at a national park. C) He removed the bees from the boot. D) He drove the bees away ...
查看完整题目与答案
【单选题】实现从IP地址到以太网地址转换的命令为:( )
A.
ping
B.
ifconfig
C.
arp
D.
traceroute
查看完整题目与答案
【单选题】修剪物体需用的命令是
A.
Trim
B.
Extend
C.
Stretch
D.
Chamfer
查看完整题目与答案
【简答题】Listen to a passage and fill in the blanks. An (1 ) is a promise to supply goods on the (2 ) stated. It can be a (3 ) which is a promise to sell goods at a stated price, usually within a stated...
查看完整题目与答案
【简答题】Questions 3 and 4 are based on the news report you have just heard. 3. A) He works at a national park. B) He is a queen been specialist. C) He removed the Beyond from the boot. D) He drove the bees aw...
查看完整题目与答案
【单选题】They practice ____________ basketball every afternoon.
A.
playing
B.
play
C.
to play
D.
played
查看完整题目与答案
【简答题】Read the following statement about offer and ask your partner to fill in the blanks, then take turns with each other. An __________ is a promise to supply ___________ on the terms and conditions state...
查看完整题目与答案
相关题目：
【单选题】实现从ip地址到以太网MAC地址转换的命令为()
A.
ping
B.
ifconfig
C.
arp
D.
traceroute
查看完整题目与答案
【判断题】I. Tell whether the flowing statements are true or false I.one of the objective of quantity purchase discounts and forward buys. 2.B a s i cally warehousing has thee functions: movement ,storage, and ...
A.
正确
B.
错误
查看完整题目与答案
【单选题】关于数据，下列说法正确的是:
A.
数据就是数学中的数，包括整数、实数等。
B.
在计算机中数据可以采用二进制、八进制、十六进制存储。
C.
数据可分为数值型、文本型等不同的数据类型，数值型数据采用补码表示，文本型采用字符编码。
D.
同样的数据在内存储器和外存储器中的占用的存储空间大小一定不同。
查看完整题目与答案
【简答题】Questions 3 and 4 are based on the news report you have just heard. 3. A) He is a queen bee specialist. B) He works at a national park. C) He removed the bees from the boot. D) He drove the bees away ...
查看完整题目与答案
【单选题】实现从IP地址到以太网地址转换的命令为:( )
A.
ping
B.
ifconfig
C.
arp
D.
traceroute
查看完整题目与答案
【单选题】修剪物体需用的命令是
A.
Trim
B.
Extend
C.
Stretch
D.
Chamfer
查看完整题目与答案
【简答题】Listen to a passage and fill in the blanks. An (1 ) is a promise to supply goods on the (2 ) stated. It can be a (3 ) which is a promise to sell goods at a stated price, usually within a stated...
查看完整题目与答案
【简答题】Questions 3 and 4 are based on the news report you have just heard. 3. A) He works at a national park. B) He is a queen been specialist. C) He removed the Beyond from the boot. D) He drove the bees aw...
查看完整题目与答案
【单选题】They practice ____________ basketball every afternoon.
A.
playing
B.
play
C.
to play
D.
played
查看完整题目与答案
【简答题】Read the following statement about offer and ask your partner to fill in the blanks, then take turns with each other. An __________ is a promise to supply ___________ on the terms and conditions state...
查看完整题目与答案