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【简答题】
How long have 1) _____ industrialists been dreaming about flying cars? So long that they're not called flying cars anymore. Now they're "roadable aircraft". And while the 2) _____ for success of such roadable aircrafts are still in doubt, that doesn't mean the 3) _____ of the flying vehicle is dead. We might just need to come at the problem from a different direction. One such new 4) _____ is the PAL-V (personal air land vehicle[车辆]) formed in Europe that changes from a road-going three-wheel motorcycle into a gyrocopter(旋翼机) that appears to fly as well as it drives -which is to say very well in both regards. Where the flying cars have suffered from a lack of lateral stability(横向稳定性) in flight and mechanical 5) _____ on the ground, the PAL-V flies as well as any gyrocopter you're likely to see and, thanks 6) _____ its wonderful suspension(悬浮) system, drives like one of the best three-wheel motorcycles in the streets. The Dutch company behind the project has completed first testing of the PAL-V One prototype(样品) and 7) _____ that it could travel through the air over a distance of up to 275 nautical miles(海里) at a 8) _____ of 95 knots(节). The company recently announced it will begin production of the PAL-V with a limited 9) _____ of 45 vehicles priced at around $400,000 apiece. So while the flying car might not have a place in immediate 10) _____, perhaps a flying, three-wheeled gyrocopter will. A) vehicle B) approach C) confirmed D) aviation E) future F) attach G) chances H) transportation I) concept J) feature K) to L) complexity M) number N) speed O) flight
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【单选题】编码细菌毒力的是
A.
Co1质粒
B.
F质粒
C.
Vi质粒
D.
ST质粒
E.
R质粒
【判断题】工笔画在上色时,通常会用淡墨调和颜色。()
A.
正确
B.
错误
【单选题】下列各种进制的数中最小的数是()。
A.
44(D)
B.
52(0)
C.
2B(H)
D.
11011(B)
【单选题】常用局域网有共享式以太网(Ethernet)、FDDI网和交换式以太网等,下面的叙述中错误的是_________。
A.
总线式以太网采用带冲突检测的载波侦听多路访问(CSMA/CD)方法进行通信
B.
FDDI网和以太网可以直接进行互连
C.
交换式集线器比总线式集线器具有更高的性能,它能提高整个网络的带宽
D.
FDDI网采用光纤双环结构,具有高可靠性和数据传输的保密性
【单选题】下列选项中,最小的数值是()。
A.
21
B.
(10111)2
C.
(11011)2
D.
(11001)2
【单选题】常用局域网有以太网、FDDI网等,下面的叙述中错误的是( )。
A.
总线式以太网采用带冲突检测的载波侦听多路访问(CSMA/CD)方法进行通信
B.
FDDI网和以太网可以直接进行互连
C.
交换式集线器比普通集线器具有更高的性能,它能提高整个网络的带宽
D.
FDDI网采用光纤双环结构,具有高可靠性和数据传输的保密性
【单选题】编码细菌毒力的质粒是
A.
F质粒
B.
结合性质粒
C.
Vi质粒
D.
R质粒
E.
Col质粒
【单选题】李时珍是哪个朝代的?
A.
B.
C.
D.
【简答题】生物体内重要的呼吸链包括 呼吸链和 FADH 2 呼吸链。
【单选题】在下列不同进制的四个数中,最小的数是()。
A.
(26)10
B.
(31)8
C.
(1D)16
D.
(11011)2
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