某栋15层的住宅楼,每户室内设有一厨一卫,卫生洁具有洗菜盆1个,低水箱蹲式大便器1个,淋浴器1个,洗脸盆1个,洗衣机龙头1个,请完成以下选择题(包括单选及多选)。
A.市政直接供水B.分区供水,高区变频调速水泵和水箱联合供水C.分区供水,高区生活水池和变频调速水泵联合供水D.水池水泵水箱联合供水
问答题他若想年获利18万。能实现吗?若不能实现。可以采取哪些措施。可行吗?
问答题他每年能获利多少?
问答题假设按照50%、30%和20%的比例投资购买甲、乙、丙三家公司股票构成投资组合,计算该投资组合的综合β系数和组合的必要报酬率。
问答题通过计算股票价值并与股票市价相比较,判断甲、乙、丙三家公司股票是否应当购买。
问答题分别计算甲、乙、丙三家公司股票的市场价值。
单项选择题Which of the following words can best describe a proper handshake?()
A.brief and strongB.brief and softC.brief and firm
单项选择题How long does a handshake usually last?()
A.As long as the conversation lasts.B.5 minutes.C.2-3 seconds.
单项选择题Keeping eye contact while shaking hands makes the other person feel().
A.nervousB.comfortableC.frightened
单项选择题If you are seated when someone comes for a handshake,you should()
A.stand up and shake his or her handB.keep seated and shake his or her handC.bow and say hello to him or her
单项选择题People can now check stories using().
A.the newspapersB.the televisionC.the Internet
单项选择题Mr Smith thinks politicians make laws().
A.to help their friendsB.to help himC.to help everybody
单项选择题Stories say businessmen give money to().
A.politiciansB.politicians and journalistsC.journalists
单项选择题Experts think this problem()
A.will get better soonB.will not get better soonC.will get worse soon
问答题你能说totwrk ,educ 和age解释了sleep的大部分变异吗?还有什么其他因素可能影响花在睡眠上的时间?它们与totwrk可能相关吗?
问答题讨论educ的估计系数的符号和大小。