皮皮学，免费搜题
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【多选题】
IPv4 有哪三个基本特征A.
无连接，发送数据包前不需建立连接
B.
尽力（不可靠），不使用任何开销来保证数据包的到达
C.
介质无关性，运作与传输数据的介质无关
D.
整体性，传输的数据包不可以被分割成更小的数据片
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】The Yerkes-Dodson law demonstrates that
A.
the level of arousal becomes too high, our performance will decrease.
B.
the level of arousal becomes too high, our performance will increase.
C.
the level of arousal becomes too high, our performance may increase or decrease.
【单选题】质量管理是指企业为了保证最经济地生产出满足用户要求的产品而形成并运用( )。
A.
一套完整的设计手段
B.
一套完整的加工工艺
C.
一套完整的质量活动、制度、手段和方法
D.
一套检测方法
【单选题】It is widely______ that smoking can cause cancer. A. believed B. think C. say D. hoped
A.
1
B.
2
C.
3
D.
4
【单选题】The Yerkes-Dodson law demonstrates that
A.
the level of arousal becomes too low, our performance will increase.
B.
the level of arousal becomes too low, our performance will decrease
C.
the level of arousal becomes too low, our performance will be best.
【简答题】简述耶基斯一多得森(Yerkes-Dodson)法则。
【简答题】用适当的连接词填空,如果一题有两空,用逗号隔开,如 a,b 1. It worried her a bit _____ her hair was turning gray. 2.I have no idea _____ we can do with these waste materials. 3.____the doctor really doubts is____my mother will ...
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