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【单选题】
指出图示平面桁架中有几根零杆。【图片】A.
4
B.
5
C.
3
D.
2
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反馈参考答案：
举一反三
【简答题】8086CPU 是一个 16 位的微处理器,具有 条数据总线, 条地址总线,可寻址程序空间为 。
【简答题】A. Buy the new software. B. Ask Jack for help. C. Stop using the software. D. Help the woman.
【简答题】加热炉的单耗
【简答题】Researchers have developed new software using smart phones’GPS and imaging abilities that determine the exact location of distant objects as well as monitor the speed and direction of moving objects．T...
【单选题】Which of the following is a disadvantage of using cloud accounting software?
A.
Cloud accounting software only allows one user to access the system at any one time
B.
Financial data held in the cloud must be manually transferred between individual computers
C.
Upgrading cloud accounting software is expensive and time-consuming
D.
Users of cloud accounting software are completely reliant on the provider of the software to ensure their data is secure and to take backups of it
【单选题】已知空间有a、b两点，电压Uab=10V，a点电位为Va=4V，则b点电位Vb为（）A、6V B、－6V C、14V D、20V
A.
6V
B.
-6V
C.
14V
D.
20V
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