When we got there, the meeting()for half an hour.A. has been onB. has onC. was onD. had been on

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.

b)

main()

{

union{ /*定义一个联合*/

int i;

struct{ /*在联合中定义一个结构*/

char first;

char second;

}half;

}number;

number.i=0x4241; /*联合成员赋值*/

printf("%c%c\n", number.half.first,

mumber.half.second);

number.half.first='a'; /*联合中结构成员赋值

*/

number.half.second='b';

printf("%x\n", number.i);

getch();

}

YouaretestingacomponentthatserializestheMeetingclassinstancessothattheycanbesavedtothefilesystem.TheMeetingclasshasthefollowingdefinition：

Thecomponentcontainsaprocedurewiththefollowingcodesegment.

MeetingmyMeeting=newMeeting（"Goals"）；

myMeeting.roomNumber=1100；

string[]attendees=newstring[2]{"John"，"Mary"}；

myMeeting.invitees=attendees；

XmlSerializerxs=newXmlSerializer（typeof（Meeting））；

StreamWriterwriter=newStreamWriter（@"C：\Meeting.xml"）；

xs.Serialize（writer，myMeeting）；

writer.Close（）；

YouneedtoidentifytheXMLblockthatiswrittentotheC：\Meeting.xmlfileasaresultofrunningthisprocedure.WhichXMLblockrepresentsthecontentthatwillbewrittentotheC：\Meeting.xmlfile？（）

A. Half-duplex Ethernet operates in a shared collision domain.

B. Full-duplex Ethernet has a lower effective throughput.

C. Half-duplex Ethernet operates in a private collision domain.

D. Full-duplex Ethernet allows two-way communication.

E. Half-duplex Ethernet operates in a private broadcast domain.