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【单选题】
在一个具有 n 个结点的无,要连通全部结点至少需要( )A.
n 条边
B.
n+1 条边
C.
n-1 条边
D.
n/2 条边
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举一反三
【单选题】Questions 21-23 are based on the passage you have just heard.
A.
He was not happy with the new director.
B.
He was not qualified to be an engineer.
C.
He wanted to travel.
D.
He found his job boring.
【单选题】飞机上,一位老人无法自主排尿,膀胱可能胀破。机上乘客张红医生和肖占祥医生自制装置,用嘴吸尿 37 分钟救人。他们 的事迹启示我们 1 生命的 价值在于能挽救他人生命 2 生命是 珍贵 的 , 生命意义是具体的 3 生命的意义需要自己 奉献 和创造 4拒绝冷漠,设身处地地善待他人
A.
A . ①②③
B.
①②④
C.
C . ①③④
D.
②③④
【单选题】Questions 21 to 23 are based on the passage you have just heard.
A.
Those who are themselves spoiled and self-centered.
B.
Those who expected to have several children but could only have one.
C.
Those who like to give expensive jewels to their children.
D.
Those who give birth to their only children when they are below 30.
【单选题】关于生命的意义，以下看法正确的是
A.
生命就像阿尔贝﹒加缪所说，其存在本身就是一种荒谬。
B.
生命的意义在一个人出生时就已经确定了，他需要用终生来实现这个意义。
C.
生命没有先验的意义，我们必须要创造一个经验的意义出来。
D.
讨论生命的意义毫无意义，因为人根本不能为自己的生活做主。
【单选题】Questions 21-23 are based on the passage you have just heard.
A.
He enjoyed teaching English.
B.
He wanted to earn more to support his family.
C.
The owner of the school promised him a good position.
D.
He could earn more as a teacher than as a travel agent.
【单选题】Questions 21 to 23 are based on the passages you have just heard.
A.
Black.
B.
White.
C.
Blue.
D.
Red.
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