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China launched its first space lab module Tiangong-1 on the evening of September 29, 2011, at the Jiuquan Satellite Launch Center in northwestern China. President Hu Jintao praised the successful launch of China's first space lab module Tiangong-1, and shook hands with the staff of the Beijing Aerospace Flight Control Center. Premier Wen Jiabao and He Guoqiang also shook hands with the staff at the Jiuquan Satellite Launch Center to congratulate on the success. Tiangong-1, which is scheduled to dock(与……对接) with the Shenzhou-8 spacecraft later this year, will pave the way for building China's first space station. During its two-year service life, Tiangong-1 will mainly conduct four tasks, such as experiments of autonomous rendezvous(自主交会) and docking procedures(程序) with the Shenzhou-8, -9, and -10 spacecrafts in the coming launches, aiming to establish the country's first space lab, according to Wu Ping, spokesperson for China's national space administration. According to the plan for China's manned space program, the Shenzhou-10 will be a manned spacecraft, possibly carrying a female Chinese astronaut who will test manual space rendezvous and docking with the Tiangong-1. Functioning as a target spacecraft, Tiangong-1 is expected to become China's first space laboratory when it connects to the above mentioned spaceships. 小题1:When Tiangong-1 was launched, _____were at the Jiuquan Satellite Launch Center. A.Premier Wen Jiabao and He Guoqiang B.Premier Wen Jiabao and President Hu Jintao C.He Guoqiang and President Hu Jintao D.President Hu Jintao and some staff 小题2:It is reported that Tiangong-1 will conduct _____ tasks during its service life. A.two B.three C.four D.five 小题3:The underlined word “establish” here means _____________. A.prepare B.build C.discover D.use 小题4:The _____ spacecraft will be carrying a female Chinese astronaut. A.Shenzhou-7 B.Shenzhou-8 C.Shenzhou-9 D.Shenzhou-10 小题5:Which of the following is WRONG according to the passage? A.Tiangong-1 was launched in the evening. B.The service life of Tiangong-1 is about two years. C.China expects Tiangong-1 to be the first space lab. D.Tiangong-1 will dock with the Shenzhou-8 spacecraft next year.
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【单选题】以下关于模拟信号和数字信号的概念哪个是不对的?
A.
处理模拟信号的电子电路称为模拟电路
B.
模拟信号在时间和幅值上都是连续的信号
C.
对于模拟信号,器件工作在截止区;对于数字信号,器件工作在放大区
D.
模拟信号研究的是输出与输入的电压电流关系;数字信号研究的是输出与输入的逻辑关系
【单选题】以下关于模拟信号与数字信号的概念哪个是不对的?
A.
处理模拟信号的电子电路称为模拟电路
B.
模拟信号在时间和幅值上都是连续的信号
C.
对于模拟信号,器件工作在截止区;对于数字信号,器件工作在放大区
D.
模拟信号研究的是输出与输入的电压电流关系;数字信号研究的是输出与输入的逻辑关系
【单选题】以下为局域网协议的有______
A.
PPP
B.
X.25
C.
SLIP
D.
Ethemetll
E.
FrameRelay
F.
EthemetSNAP
G.
Ppp-Multilink
H.
IEEE802.3
【多选题】以下为局域网协议的有()。
A.
PPP
B.
X.25
C.
SLIP
D.
Ethernet II
E.
Frame Relay
F.
Ethernet SNAP
G.
PPP MultiLink
H.
IEEE 802.3
【单选题】以下为局域网协议的有( )。
A.
PPP
B.
X.25
C.
SLIP
D.
Ethernet Ⅱ
E.
IEEE 802.3
【多选题】以下为局域网协议的有()。
A.
PPP
B.
EthernetII
C.
X.25
D.
FrameRelay
E.
SLIP
F.
IEEE802.0/802.3
G.
Ethernet SNAP
【单选题】在时间和幅值上都是连续变化的信号。请问是什么信号?
A.
数字信号
B.
电子信号
C.
电路信号
D.
模拟信号
【单选题】兆欧表由两部分构成,一部分是由比率型磁电式指示仪表组成的测量机构;另一部分由()构成的。
A.
干电池供给系统
B.
手摇发电机电源供给系统
C.
电动机供给系统
D.
外部电源供给系统
【多选题】以下为局域网协议的有( ) 。
A.
Ethernet
B.
IEEE802.0/802.4
C.
PPP
D.
IEEE802.0/802.5
【简答题】安全对策措施的基本要求不包括( )。
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