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【单选题】
Directions: There are two passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You should decide on the best choice. Passage One The boy has gone off to college now. And here I am, left with all the peace and quiet I have learned not to miss. I was not a man who wished for children. It seemed quite opposite to the idea of human happiness. I was single most of my life, and parenthood was something that caused other people to suffer. I watched it from a distance, and trembled with horror. When they were small, children seemed to scream for no apparent reason. As teenagers, they seemed to lose all sanity (神智正常), with moods (情绪) changing back and forth, while listening to music with more bad language than my uncles used when drunk. In between babyhood and high school graduation (if their parents were lucky), they were mostly just unclean. Then one entered my life. I did not plan on him. He just came in the package, like the ninth piece of chicken in an eight-piece box, and, in time, made me pay for all the happiness I had enjoyed. He was 11 when he appeared, past the screaming years and before the age where everything that fell from my mouth was considered stupid. I got him in the unclean years, when I tried to avoid close contact with him because I was never quite certain where he had been. This is the child who once licked spaghetti sauce off the underside of his arm. No more needs to be said. When he discovered girls he got much cleaner, but suddenly I was unfit to be around. I always said the wrong thing, or too loud a thing. When he had a girl over, I had to go to whatever room he was farthest from. "I used to be cool," I said. "Some people think I still am." He gave me a pitying look. So did his mom. And now he is gone to college and I miss him, which is how I know there is indeed a God and He is good at playing tricks, and knows how to make a man pay for his transgressions (罪过). He remembers that long ago I felt annoyed in my airplane seat, thinking over and over that the screaming baby behind me should've been left at home, even if it meant her grandparents wouldn't see her until Christmas. I am not alone in this sadness in our house, in this empty nest. I barely even had a nest, before it was empty, though I guess I have no one to blame but me. His mom misses him, too, of course. Even the dog misses him. The dog loved the boy. Woody Bo met him every day at the door after school, knowing he was home because every time the boy locked his car, it gave a short, quick honk (喇叭声). Woody who is too fat to jump (usually), shot into the air at the sound, destroying furniture on a mad dash to the door. A dog should love his boy, I suppose. His world is in pieces now. The boy has been gone for months. The dog will not even go in his room -- not one time since he left. Recently, my wife had to use the boy's car and, unsure if she had locked it, aimed the remote control (遥控) thing at the window and pressed "lock." The horn gave its quick honk, and the dog shot into the air and raced to the door, his tail wagging (摇). He sat there a long time. I guess I know how he feels. 22. What do we learn about the author's relationship with his son from the passage?
A.
He had his son after eleven years of marriage.
B.
His son is from his wife's previous marriage.
C.
He enjoys becoming his son's close friend.
D.
His son made him talk the way a father should.
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【判断题】兵马俑显示了秦朝高超的造型艺术水平。
A.
正确
B.
错误
【单选题】质点作圆周运动,如果知道其切向加速度越来越小,则质点的运动速度( )
A.
越来越小
B.
越来越大
C.
大小不变
D.
不能确定
【单选题】以下关于VPN技术描述正确的是()。
A.
IPSEC是个三层VPN技术,使用TCP179端口
B.
L2TP是个二层VPN技术,使用UDP1701端口
C.
MPLS是个二、三层VPN技术,使用TCP6200端口
D.
GRE是一个二层VPN技术,使用了UDP179端口
【单选题】以下关于VPN技术描述正确的是()
A.
IPSec是个三层VPN技术,使用TCP19端口
B.
L2TP是个二层VPN技术,使用UDP1701端口
C.
MPLS是个二、三层技术,使用TCP6200端口
D.
GRE是一个二层技术,使用了UDP179端口
【简答题】怎么防治大豆根腐病?防治大豆根腐病措施
【单选题】防治葡萄白腐病时,果园土表用薄膜覆盖,将土表的病原物与葡萄果实分隔开来,是利用了()的措施防治植物病害。
A.
化学防治
B.
农业防治
C.
物理防治
D.
抗病育种
【单选题】以下关于VPN技术描述正确的是()
A.
IPSEC是个三层VPN技术,使用TCP179端口
B.
L2TP是个二层VPN技术,使用UDP1701端口
C.
MPLS是个二、三层VPN技术,使用TCP6200端口
D.
GRE是一个二层、技术,使用了UDP179端口
【多选题】以下关于VPN的描述,正确的是
A.
它是在互联网上构造的一个虚拟的私有网络
B.
它是Virtual Private Network,虚拟专用网的缩写
C.
VPN采用加密和认证技术,来达到“数据即使被窃取也无法被解读”
D.
构建VPN时,最常使用的协议是Ipsec
【单选题】以下关于VPN技术描述正确的是()
A.
配置GRETunnel时,Tunnel接口必须配置IP地址;
B.
IPSEC由于是三层VPN,所以无法穿越NAT;
C.
IPSEC只能对IP报文进行安全加密,不能对GRE、L2TP报文进行安全加密;
D.
GRETunnel接口由于是逻辑接口,所以该接口不能启用OSPF路由协议
【多选题】以下关于MPLS VPN描述正确的是()。
A.
MPLS domain包括CE、PE和P设备
B.
CE是用户边缘设备
C.
PE是服务商边缘路由器
D.
P是服务提供商网络中的骨干路由器
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