在△ABC中,若|BA+BC|=|AC|,则△ABC一定是( ) A.等腰三角形B

题型:选择题

问题:

在△ABC中,若|
BA
+
BC
|=|
AC
|,则△ABC一定是(  )
A.等腰三角形B.直角三角形
C.等腰直角三角形D.不能确定
考点:余弦定理用数量积判断两个向量的垂直关系向量模的计算
题型:选择题

阅读理解

       Look at the photo. The two girls have big blue eyes and long brown hair. They are ten. They are in the same class. The one in a yellow skirt is Lily. The other one(另一个) in an orange skirt is Lucy. Their dad(爸爸) is Mr.White. He is in a brown coat. Their mum is Mrs.White. She is in black shoes. Bob is their

brother(哥哥). He is in a blue cap. He is a high school student. Look! Lucy and Lily are in the green car.

1. Mrs.White is _________.

A. Lily's mum

B. Lucy's mum

C. Lily and Lucy's teacher

D. A and B

2. Mr.White and Mrs. White have _________.

A. one son(儿子) and two daughters(女儿)

B. one daughter and two sons

C. one son and one daughter

D. two sons and two daughters

3. Mr.White is _________.

A. in black shoes

B. in a blue cap

C. in a brown coat

D. in a yellow sweater

4. _________ isn't in the green car.

A. Bob

B. Lily

C. Lucy

D. The two girls

5. What color are the girls' eyes?

A. Big.

B. Blue.

C. Brown.

D. Black.

题型:选择题

(2014年商丘期末)以“弘扬竹文化,低碳先行”为主题的中国第六届竹文化节在江西宜春举办,右面是这次文化节节徽的主体部分,整个构图的色彩全为绿色。请用简要的文字说明其构图特征及文化内涵。

答:________________________________________________________________________

________________________________________________________________________

________________________________________________________________________

________________________________________________________________________

解析:答案:

题型:选择题

证券公司和资产托管机构应当保存资产管理业务的会计账册、有关的合同和协议以及交易记录等文件,自资产管理合同终止之日起保存期不得少于 ( )年。

A.5

B.10

C.15

D.20

题型:选择题

关于国民经济评价中影子汇率表述错误的是( )。

A.影响汇率即外汇的影子价格

B.影子汇率换算系数是国家外汇牌价与影子汇率的比值

C.影子汇率通过影子汇率换算系数计算

D.影子汇率降低时,引进国外技术、设备方案的费用降低

题型:选择题

人生目的是人在人生实践中关于自身行为的根本指向和人生追求,它所认识和回答的根本问题是( )

A.人为什么活着

B.人如何对待生活

C.怎样对待人生境遇

D.怎样选择人生道路

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