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【简答题】
连通有 Y 个顶点的无的所有顶点至少需要 ( ) 条边。
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】关于投诉事项鉴定或者检测的规定,正确的是P316
A.
可以由当事人双方约定的鉴定或者检测部门鉴定
B.
没有约定鉴定,检测部门的，当事人一方可以自行向法定鉴定或者检测机构申请鉴定或者检测
C.
鉴定,检测费用按双方约定承担
D.
鉴定,检测费用没有约定的，由监定,检测申请方先行承担
E.
鉴定,检测的时间计人投诉处理时间
【单选题】用戴维南等效电路求当 R L 为多少时获得最大功率,最大功率为多少?
A.
20/7欧姆；20W
B.
20/7欧姆；10W
C.
10/7欧姆；40W
D.
10/7欧姆；15W
【单选题】P21
A.
The Vikings' ocean explorations
B.
The making of European nations
C.
The Vikings' everyday life
D.
The Europeans' Arctic discoveries
【单选题】P21
A.
She could barely respond to all her 500 Facebook friends
B.
She spent more time updating her friends than her family
C.
She could barely balance Facebook updates and her work
D.
She didn't seem to be doing as well as her Facebook friends
【单选题】关于霍尔传感器说法不正确的是( )
A.
霍尔片越厚，霍尔传感器输出灵敏度越大
B.
霍尔片越薄，霍尔传感器输出灵敏度越大
C.
霍尔传感器可以作测量元件
D.
霍尔传感器可以作开关元件
【单选题】P21
A.
It has been well received by many tea drinkers.
B.
It does not bring the promised health benefits.
C.
It has made tea farmers' life easier.
D.
It does not have a stable market.
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