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【单选题】
John计划在他的局域网建立防火墙,防止Internet直接进入局域网, 反之亦然。在防火墙上他不能用包过滤或SOCKS程序. 而且他想要提供给局域网用户仅有的几个Internet服务和协议。John应该使用的防火墙类型下面哪个描述是最好的?
A.
使用squid代理服务器
B.
NAT
C.
IP 转发
D.
IP 伪装
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皮皮学刷刷变学霸
举一反三
【单选题】解语老猿开晓户,( )。
A.
学飞雏鹤落高松
B.
隔水悠扬午夜钟
C.
轻于粉蝶瘦于蜂
D.
露似真珠月似弓
【单选题】弗洛伊德提出的人格结构中最高的监督和惩罚系统是 ( )
A.
. 自我
B.
. 本我
C.
. 超我
D.
. 统我
【单选题】下列铁碳合金中,焊接性最好的是( )。
A.
低碳钢
B.
可锻铸铁
C.
高碳钢
D.
灰口铸铁
【多选题】The Dinner Party The American does not join in the 1 but watches the other guests. As he looks, he sees a strange expression ___2____ the face of the ___3____. She is staring ___4____ahead, her __...
A.
hostess
B.
come over
C.
straight
D.
whispers
E.
none
F.
hotness
G.
comes to
H.
argument
I.
effective
J.
quickly K. bait L. must be M. motions N. widen O. shortly P. muscles Q. comes over R. motion S. place T. slightly
【单选题】This dinner looks _____ to me, and I like it. [     ]
A.
terrible
B.
good
C.
badly
D.
nicely
【单选题】滚动轴承按可承受载荷方向分类时,圆柱滚子轴承属于 ____________ 轴承。
A.
向心
B.
推力
C.
向心推力
D.
推力向心
【单选题】显示用户主目录下所有的目录和文件使用下面哪个命令?(假设您的当前目录是根目录)
A.
ls
B.
ls ~
C.
ls -la
D.
ls -a ~
【单选题】---Let's go out for dinner this evening. ---It _______ great
A.
hears
B.
listens
C.
looks
D.
sounds
【单选题】Woman: Dont you think this candle light dinner is very romantic? Man: Sure, at least I dont have to look at the food. Question: What does the man think of the food?
A.
It is indeed quite romantic!
B.
It doesn't look very delicious.
C.
It looks tasty and smells good.
D.
It's a pity he can't see clearly what he's eating.
【判断题】维生素E可有效对抗自由基,抑制过氧化脂质生成,祛除黄褐斑。
A.
正确
B.
错误
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