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【多选题】
下面关于DNS的描述,哪个是正确的
A.
DNS是域名与IP地址的映射
B.
DNS是一个分布式数据库
C.
DNS是统一资源定位符
D.
DNS是域名系统
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【单选题】英国工程师( )在抽水机的基础上,发明了把动力装置和排水装置结合在一起的蒸汽泵,制造出了第一台用蒸汽作为动力的抽水机。
A.
萨维利
B.
纽可门
C.
瓦特
D.
史蒂芬森
【单选题】What can we learn about the childrens homework from the passage?
A.
It is so difficult for them that they can't finish in a short time.
B.
It is so much that they do not have time to play.
C.
It is so little that they have plenty of time to watch television.
D.
It is so easy for them that they can finish soon.
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A.
writing
B.
waste
C.
good
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【单选题】1698年,英国工程师( )在抽水机的基础上,发明了把动力装置和排水装置结合在一起的蒸汽泵,制造出了第一台用蒸汽作为动力的抽水机。
A.
纽可门
B.
瓦特
C.
希罗
D.
萨维利
【简答题】A: What can I do for you ? B: I want a T-shirt for my father. A: 51 ? This kind of T-shirt sells well. B: It looks nice. I think my father will like it. A: 52 ? B: Size M. A: 53 ? We have white, black...
【单选题】我国视频的制式是pal制式。所以我国的电视节目的帧平率为每秒多少帧的标准? 软件默认标准是国外的,阢中国,所以导入视频的设置应该修改这个值。
A.
30
B.
24
C.
25
D.
29.98
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