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举一反三
【单选题】According to a survey, which was based on the responses of over 188,000 students, today’s traditional-age college freshmen are "more materialistic and less altruistic(利他主义的)"than at any time in the 17...
A.
5), the author means that ______.A. business management should be included in educational programsB. human wisdom has accumulated at an extraordinarily high speedC. human intellectual development has reached new heightsD. the importance of a broad education should not be overlooked
【单选题】According to a survey, which was based on the responses of over 188,000 students, today’s traditional-age college freshmen are "more materialistic and less altruistic (利他主义的) " than at any time in the...
A.
have never attached so much importance to moral sense
B.
have never been so financially well off as today
C.
have never been so materialistic as today
D.
have never been so interested in the arts
【单选题】According to a survey, which was based on the responses of over 188,000 students, today"s traditional-age college freshmen are "more materialistic and less altruistic (利他主义的 )" than at any time in the...
A.
have never been so materialistic as today
B.
have never been so interested in the arts
C.
have never been so financially well off as today
D.
have never attached so much importance to moral sense
【多选题】. 交换机端口可以分为半双工与全双工两类。对于100Mbps的全双工端口，端口带宽为
A.
100Mbps
B.
200Mbps
C.
400Mbps
D.
800Mbps
相关题目：
【单选题】According to a survey, which was based on the responses of over 188,000 students, today’s traditional-age college freshmen are "more materialistic and less altruistic(利他主义的)"than at any time in the 17...
A.
5), the author means that ______.A. business management should be included in educational programsB. human wisdom has accumulated at an extraordinarily high speedC. human intellectual development has reached new heightsD. the importance of a broad education should not be overlooked
【单选题】通信系统按调制方式分为（）
A.
基带传输和频带传输
B.
基带传输和宽带传输
C.
宽带传输和频带传输
D.
模拟信号和数字信号
【单选题】According to a survey, which was based on the responses of over 188,000 students, today’s traditional-age college freshmen are "more materialistic and less altruistic (利他主义的) " than at any time in the...
A.
have never attached so much importance to moral sense
B.
have never been so financially well off as today
C.
have never been so materialistic as today
D.
have never been so interested in the arts
【多选题】无线通信系统的接收机由（）组成。
A.
天线
B.
滤波器
C.
放大器
D.
A/D转换器
【单选题】小型对讲机性能优良，体积小，（）十分广泛。
A.
规格
B.
形状
C.
功能
D.
用途
【单选题】船舶内部的通信系统,一般指的是__。I.电话 II.传令钟 III.广播 IV.警报系统
A.
Ⅰ+Ⅱ+Ⅲ
B.
Ⅰ+Ⅱ+Ⅳ
C.
Ⅱ+Ⅲ+Ⅳ
D.
Ⅰ+Ⅱ+Ⅲ+Ⅳ
【单选题】1G即第一代移动通信系统，主要的业务为（）
A.
数据
B.
语音
C.
短信
D.
彩信
【单选题】第一代蜂窝移动通信系统AMPS的多址方式是（）。
A.
TDMA
B.
CDMA
C.
SDMA
D.
FDMA
【判断题】数据双向传输不能同时进行的通信模式叫做半双工通信。
A.
正确
B.
错误
【单选题】数据通信按照信号传送方向和时间的关系,信道的通信方式可以分为三种:单工、半双工和( )。
A.
模拟传输
B.
信道传输
C.
数字传输
D.
全双工
【单选题】相干光通信系统又成为（ ）
A.
外调制光纤通信系统
B.
间接调制光纤通信系统
C.
外差光纤通信系统
D.
内调制光纤通信系统
【判断题】AT89S51的串行异步通信口为半双工。
A.
正确
B.
错误
【单选题】According to a survey, which was based on the responses of over 188,000 students, today"s traditional-age college freshmen are "more materialistic and less altruistic (利他主义的 )" than at any time in the...
A.
have never been so materialistic as today
B.
have never been so interested in the arts
C.
have never been so financially well off as today
D.
have never attached so much importance to moral sense
【多选题】. 交换机端口可以分为半双工与全双工两类。对于100Mbps的全双工端口，端口带宽为
A.
100Mbps
B.
200Mbps
C.
400Mbps
D.
800Mbps