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【单选题】
The Ezonexam LAN is upgrading all devices to operate in full duplex. Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?A.
Full-duplex Ethernet uses two wires to send and receive. Half-duplex Ethernet uses one wire to send and receive
B.
Full-duplex Ethernet consists of a shared cable segment. Half-duplex Ethernet provides a point-to-point link
C.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
D.
Full-duplex Ethernet uses a loopback circuit to detect collisions. Half-duplex ethernet uses a jam signal
E.
None of the above
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【单选题】针对 数据库S_T, 查找student表中所有王*民的同学的学号,姓名,院系
A.
select sno , sname , sdept from student where sname like ' 王_民 '
B.
select sno , sname , sdept from student where sname like ' 王%民 '
C.
select sno , sname , sdept from student where sname like ' 王%民% '
D.
select sno , sname , sdept from student where sname like ' 王_民% '
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A.
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B.
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C.
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D.
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E.
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【单选题】下列加点字读音正确的一项是 ( ) 。
A.
畏 惧 (jù) 凄 (qī) 凉
B.
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C.
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D.
覆 (fù) 盖 稍 (shào) 微
【单选题】针对 数据库S_T, 查找student表中所有姓王且最后一个字是“民”的同学的学号,姓名,院系。
A.
select sno,sname,sdept from student where sname like '王_民';
B.
select sno,sname,sdept from student where sname like '王%民';
C.
select sno,sname,sdept from student where sname like '王%民%';
D.
select sno,sname,sdept from student where sname like '王_民%';
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