皮皮学,免费搜题
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【单选题】
化验锅炉水含盐量加指示剂后的初始颜色是()色。
A.
B.
葡萄酒红
C.
D.
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举一反三
【单选题】What does Andy ask the bank clerk to do?
A.
Open the mail.
B.
Send the mail.
C.
Keep the mail.
D.
Copy the mail.
【判断题】测量电阻时要断开电源,不是因为安全问题,而是连接电源会引起电阻测量的较大误差。
A.
正确
B.
错误
【单选题】According to the bank clerk, the rate for buy is 625 today.
A.
T
B.
F
【单选题】The bank clerk listened carefully he could discover exactly what the client wanted.
A.
in case that
B.
now that
C.
so that
D.
provided that
【判断题】Duplex Specific Nuclease能够降解双链DNA和DNA:RNA杂合体中的RNA。
A.
正确
B.
错误
【多选题】Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?()
A.
Full-duplex Ethernet uses CSMA/CD to prevent collisions.
B.
Half-duplex Ethernet uses a loopback circuit to detect collisions.
C.
A full-duplex Ethernet card allows 20Mbps for data transmission.
D.
Full-duplex Ethernet makes use of two pairs of wires for data.
E.
An Ethernet hub can operate both half and full duplex simultaneously.
【判断题】The bank clerk issued a deposit book and a bank card to the
A.
正确
B.
错误
【单选题】The bank clerk listened carefully _______ he could discover exactly what the client wanted.
A.
in case that
B.
now that
C.
so that
D.
provided that
【多选题】When you compare the differences between half-duplex and full-duplex Ethernet, which of the following characteristics are exclusive to half-duplex? (Select two answer choices)
A.
Half-duplex Ethernet operates in a shared collision domain.
B.
Half-duplex Ethernet operates in an exclusive broadcast domain.
C.
Half-duplex Ethernet has efficient throughput.
D.
Half-duplex Ethernet has lower effective throughput.
E.
Half-duplex Ethernet operates in an exclusive collision domain.
【单选题】In Ethernet networks, duplex mismatches will lower performance. Which error statistics can be seen if a duplex mismatch is present?()
A.
collisions on the full-duplex side; runts on the half-duplex side
B.
collisions on the full-duplex side; collisions on the half-duplex side
C.
collisions on the half-duplex side; framing errors on the full-duplex side
D.
collisions on the half-duplex side; giants on the full-duplex side
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