问题 判断题

证券市场线方程表明,单个证券的期望收益率与标准差之间存在线性关系。( )

答案

参考答案:

解析: 证券市场线是以Ep为纵坐标、β。为横坐标的坐标系中的一条直线,它的方程是:Ei=rii(Em-ri)。其中:E和β分别表示证券或证券组合的期望收益率和β系数,证券市场线表明证券或组合的期望收益率与由β系数测定的风险之间存在线性关系,充分体现了高风险高收益的原则。

单项选择题
阅读理解

Every American family has its own traditions on Thanksgiving Day, and mine is no difference. Once the national holiday arrives, my mom rises early to make the meal. She puts a turkey in the oven, chops carrots and bakes pies. I’m sorry to say that the men in the family – my dad, my younger brother and myself – rarely pitch in to help. Our job is to wash the mountain of dirty dishes after the meal is over.

Around 2 pm every Thanksgiving Day, family members seat themselves around the kitchen table. Plates of turkey, vegetables, salad, rolls and pies cover it. At this point, we can hardly keep ourselves from drooling (流口水) all over our fancy clothes, but it’s not yet time to eat.

First, we must bow our heads, close our eyes and say a prayer of thanks aloud to God for giving us everything we have. Under normal circumstances, I would have no problem making a list of things I am thankful for. I grew up in a loving family. My parents, who aren’t wealthy, took out loans to help me pay for university.

But, the funny thing is, every time I sit down for Thanksgiving dinner and try to say a prayer of thanks, my mind usually goes blank. I think it has something to do with my growling (咕咕叫) stomach and all of that food sitting right there under my nose.

Eventually, though, we all finish our short prayers and dig in. To be sure, the day includes other highlights – visiting with family and watching football. But usually around 6 pm we are all ourselves stuffed like turkeys and thankful to have a nice warm bed to sleep in.

小题1:The purpose of the text is to ________.

A.tell what the family do for Thanksgiving Day

B.tell how the family spends Thanksgiving Day

C.introduce foods served on Thanksgiving Day

D.introduce the American Thanksgiving Day小题2:On Thanksgiving Day the author’s family do the following except ________.

A.watching a movie

B.making visits

C.having a big meal

D.watching football小题3:Why does the author’s mind usually “go blank” when saying a prayer of thanks?

A.He is too thankful to say a word.

B.His mind is on the food before him.

C.He feels too excited to speak.

D.He is shy to speak in public.小题4:The underlined phrase “dig in” in the last paragraph is closest in meaning to “________”.

A.chat with others

B.make a hole

C.mix things up

D.start eating