一根细线下端拴一可看作质点的小球,上端悬挂在O点,制成一个单摆,摆长为l.现在O

题型:选择题

问题:

一根细线下端拴一可看作质点的小球,上端悬挂在O点,制成一个单摆,摆长为l.现在O点正下方,距O点为l/2处固定一根钉子,如图所示.下面的说法中正确的是

A.该单摆振动时左右两侧升高的最大高度相等

B.该单摆振动时左右两侧的最大位移相等

C.该单摆振动时左右两侧所用的时间相等

D.该单摆振动的周期是

考点:单摆的周期
题型:选择题

(五)

某公司各种长期资金筹集来源的构成及其比例如下表所示,根据表中数据回答下列问题:
资本结构金额(万元)相关资料
长期借款50010年期,年利率7.5%,每年付息一次,筹资费用率1%
发行长期债券8005年期,票面利率8%,每年付息一次,发行费用率3%
普通股股本1500每股市价9元,筹资费用率5%,预计每股股利0.7元,股利年增长率为4%
留存收益200资本成本为10%
合计3000企业所得税税率为25%

该公司加权平均资本成本为( )。

A.9.4%

B.8.9%

C.11.2%

D.10.2%

题型:选择题

物体的 ____ 可用天平测量,测量前应将天平放在 ____ ,把游码拨至 _______ ,调节 _____ 螺母,使横梁平衡.调节中,若发现指针偏向分度盘的左方,则应将螺母向 _____ 调.测量时,物体应放在_____盘中,在_____盘中加砝码后若指针左偏,则说明砝码的质量____了,应换质量____的砝码或调节游码,直至天平衡梁重新平衡.此时,物体的质量就等于盘中砝码的总质量与____________.

题型:选择题

Ade, a keen pottery collector, saw a notice for an auction of Bede pottery in the January edition of Antiques News. He travelled 300 kilometres to attend the auction in order to bid for a particularly rare example of Bede pottery, specifically mentioned in the lists of items to be auctioned. However, when he got to the auction site he found a notice outside, stating that the auction had been cancelled. Ade went into a nearby antique shop and saw an example of the type of pottery he had come to bid for. The price ticket stated that it was £500, but Ade said he was only willing to pay £350 for it. The shopkeeper, Chip, said he would sell it for £400 and as Ade said he would like time to think about it over lunch, Chip agreed not to sell it before Ade returned.However, when Ade returned to buy the pottery, he found that Chip had already sold it to someone else, who had paid £450 for it.Required:In the context of contract law, advise Ade whether he can take action against:

(b) Chip, for not selling the pottery to him.

题型:选择题

()是指其变化先于市场变化,并由于这些经济指标的变化引起市场的变化。

题型:选择题

一般以施工图设计为投标报价的基础,投标人的投标报价较有依据,有利于实行总价合同,降低业主的风险,也有利于过程中的()工作。

A.质量控制

B.进度控制

C.合同管理

D.投资控制

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