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【单选题】
听力原文：Isn't that new concert hall outstanding? What does the speaker mean?A.
Isn't he standing outside the concert hall?
B.
The concert hall in the city isn't new.
C.
Is the concert hall still standing?
D.
The new concert hall is excellent.
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举一反三
【单选题】以下不能满足当c的值分别为1、3、5三个数时值是“真”,否则值是“假”的表达式是
A.
!((c<3)&&(c>1))&&!((c<5)&&(c>3))&&(c<=5)&&(c>=1)
B.
(c==1)||(c==3)||(c==5)
C.
(c!=2)&&(c!=4)&&(c>=1)&&(c<=5)
D.
(c=1)||(c=3)||(c=5)
【简答题】当a、b、c的值分别为3、4、5时,以下语句执行后b的值为_________。 if (a>c) {a=b;b=c;c=a;} else {a=c;c=b;b=a;}
【单选题】以下不能满足当c的值分别为1、3、5三个数时值是“真”,否则值是“假”的表达式是 ( )
A.
!((c<3)&&(c>1))&&!((c<5)&&(c>3))&&(c<=5)&&(c>=1)
B.
(c= =1)||(c==3)||(c==5)
C.
(c!=2)&&(c!=4)&&(c>=l)&&(c<=5)
D.
(c=1)||(c=3)||(c=5)
【单选题】If the router R1 has a packet with a destination address 192.168.1.255, what describes the operation of the network（）。
A.
R1 will forward the packet out all interfaces.
B.
R1 will drop this packet because this it is not a valid IP address.
C.
As R1 forwards the frame containing this packet, Sw-A will add 192.168.1.255 to its MAC table.
D.
R1 will encapsulate the packet in a frame with a destination MAC address of FF-FF-FF-FF-FF-FF
E.
As R1 forwards the frame containing this packet, Sw-A will forward it to the device assigned the IP address of 192.168.1.255.
【单选题】当a,b,c的值分别为3,4,5时,以下各语句执行后a,b,c的值为多少( ) if (a>c) {a=b; b=c; c=a;} else {a=c; c=b; b=a;} printf(“%d,%d,%d”,a,b,c);
A.
5，4，5
B.
5，5，4
C.
3，4，5
D.
5，4，3
【单选题】当a,b,c的值分别为3,4,5时,以下各语句执行后a,b,c的值为多少( ) if (a>c) {a=b;b=c;c=a;} Else {a=c;c=b;b=a;} printf(“%d,%d,%d”,a,b,c);
A.
5，4，5
B.
5，5，4
C.
3，4，5
D.
5，3，4
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