一台主机的IP地址为203.93.12.68,子网掩码为255.255.255.0。

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问题:

一台主机的IP地址为203.93.12.68,子网掩码为255.255.255.0。如果该主机需要向子网掩码为255.255.255.0的202.93.12.0网络进行直接广播,那么它应使用的源IP地址为( )。

A.203.93.12.255

B.203.93.12.68

C.202.93.12.255

D.202.93.12.0

考点:计算机等级考试网络技术全国计算机等级考试三级网络技术真题2011年9月
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近代著名思想家、翻译家严复,船政后学堂驾驶专业第一届毕业生。1920年他回到福州后居住福州三坊七巷()。

A、塔巷

B、郎官巷

C、安民巷

D、宫巷

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INTERNATIONAL LIBRARY
Books, CDs, and videos, over 100
foreign newspapers and magazines
Entrance free:
Monday – Saturday 9:00 a.m.—6:00 p.m.
New England House , Museum Street
PAINTING COMPETITION
For children 7—15 years old
Paint a picture of an animal
Send it to:
Young Artist Magazine 22 Green Street
Before October 15 and win a bicycle!
Choose the best choice from A﹑B or C according to what you read.
小题1:What can you paint if you want to take part in the painting competition?
A. A bicycle.           B. A panda             C. A flower.
小题2:How many days a week can you go to the library?
A. Six days.            B. Five days.          C. Seven days.
小题3:How long is the library open a day?
A. Nine hours.          B. Ten hours.          C. Eight hours.
小题4:What will you win if you take part in the competition before October 15?
A. A car.               B. An animal.          C. A bicycle.
小题5:Do you need to buy a ticket if you go to the library?
A. Yes, I do.           B. No, I don’t.       C. Sorry, I don’t know.
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抛物线y=x2+ 2x-3与x轴交点的个数有 [ ]

A.0个

B.1个

C.2个

D.3个

题型:单项选择题

更换()时,不用考虑阀门的安装方向。

A.截止阀

B.减压阀

C.止回阀

D.闸板阀

题型:单项选择题

用电火花点燃甲烷和空气的混合物时,当点火能量为0.18mJ,该混合气体便着火。

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