在下图中，从顶点V1出发，按广度优选遍历图的顶点序列是()
A. V1 V5 V3 V4 V2 V6 V7
B. V1 V5 V3 V4 V2 V7 V6
C. V1 V7 V2 V6 V4 V5 V3
D. V1 V2 V4 V7 V6 V5 V3
人民检察院应当在自接到公安机关提请逮捕后的14日内作出决定。()
A. 正确
B. 错误
加强公安队伍正规化建设，有利于提高队伍的整体素质和战斗力，适应薪时期公安工作的要求；有利于增强公安队伍拒腐防变能力，自觉抵制社会不良风气的侵袭；有利于促进人民警察同广大人民群众的联系，密切警民关系。()
A. 正确
B. 错误
Why does the author assert that the development of technology has led to a higher level of
A. Looking back on the "good old days" makes modern man's life all the more stressful.
B. Now that less work is physical and more is mental, it is relatively difficult to remove oneself —physically and mentally —from it.
C. The sophisticated communication technology is keeping busy men and women "within call" no matter whether they are at home or on vacation.
D. Both B and C.
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