(8分)如图所示,一个有界的匀强磁场,磁感应强度B=0.50T,磁场方向垂直于纸

题型:计算题

问题:

(8分)如图所示,一个有界的匀强磁场,磁感应强度B=0.50T,磁场方向垂直于纸面向里,MN是磁场的左边界.在距磁场左边界MN的1.0m处有一个放射源A,内装放射物质(镭),发生α衰变生成新核Rn(氡).放在MN左侧的粒子接收器接收到垂直于边界MN方向射出的α粒子,此时接收器位置距直线OA的距离为1m.

(1)写出Ra的衰变方程;

(2)求衰变后Rn(氡)的速率(质子、中子的质量为1.6×10-27kg,电子电量e=1.6×10-19C).

考点:带电粒子在匀强磁场中的运动
题型:计算题

下列方法中,不属于WindowListener接口的是

A.windowOpened()

B.window Closed()

C.window Activated()

D.mouseDragged()

题型:计算题

某公司需要推出一种新产品。该项目的投资建设需要设备投资100万元,全为自有资金,项目计算期为5年。按税法规定,采用直线折旧法,残值率为5%。在计算期结束后,该公司欲出售该设备,估计市场价值为30万元。为了进行产品A的生产,还耍占用公司现有的一栋厂房。这栋厂房的折旧已经计提完毕,账面价值为0,但仍可继续使用5年,能够满足项目的需求。如果不用于该项目,可能让出去,转让收入为250万元。

经预测,该项目在未来5年时间内的产量分别为5000单位、8000单位、12000单位、10000单位和 6000单位。产品第一年的单价为300元,以后每年增长2%,销售税金及附加为销售收入的5.5%,预计单位经营成本将在第一年100元的基础上,每年增长10%。无摊销费、维简费。各年年初的流动资金总量为 10万元、10万元、16.53万元、24.97万元、21.22万元。该公司适用的所得税税率为33%,公司的平均资金成本为15%。

[问题一]

试计算本次投资的现金流量

[问题二]

计算投资回收期、净现值和内部收益率评价指标

[问题三]

评价该投资计划的财务可行性

题型:计算题

管道的各项生产活动都应符合国家和地方安全、()法规的要求。

题型:计算题

When I tell people that I’m a professor of communication, they often are confused (1) what the term "communication" means. Many people think mass communication is the (2) type of communication, but mass communication is only one form of communication. The study of mass communication focuses on messages that are (3) over (4) such as television, newspapers, and radio. Other areas of (5) focus on the messages individuals send to one another. Some of the major contexts in which communication is studied (6) the interpersonal context, the organizational context, and the intercultural context. A scholar studying (7) communication, for example, might examine how married couples (8) with misunderstandings and the effects these misunderstandings have on (9) satisfaction. Organizational communication scholars, on the other hand, might study (10) the communication styles used by managers and their subordinates influence productivity and efficiency in a company or factory.
My area of specialization is intercultural communication. Intercultural communication is an (11) field of study which incorporates research from disciplines (12) as social psychology, sociology, cultural anthropology, sociolinguistics, and of course, communication. One of the (13) important areas of research addressed by intercultural scholars is how misunderstandings can be (14) when people communicate with Others from different (15) . To understand the process of intercultural communication, we must study how individuals’ cultural backgrounds (16) their communication behaviors.
The area of intercultural communication is a relatively new (17) of study even in the United States. While most Chinese students studying communication in the United States (18) on mass communication, there are some who are interested in intercultural communication and plan to return to China to teach and (19) research in this area. The work of these Chinese scholars on intercultural communication is important because it will help improve (20) between Chinese and Americans in the future.

题型:计算题

以下争议可以申请行政复议的是()

A、认为行政机关侵犯合法经营自主权的

B、申请行政机关履行保护人身权利,行政机关没有履行的

C、对具体行政行为所依据的部分规定合法性产生争议的

D、不服行政机关对民事纠纷作出的调解

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