简述维生素D的生理功能。

某企业长期持有A股票，目前每股现金股利2元，每股市价20元，在保持目前的经营效率和财务政策不变，且不从外部进行股权融资的情况下，其预计收入增长率为10%，则该股票的股利收益率和期望报酬率分别为( )。

A．14%和21%

B．12%和20%

C．11%和21%

D．10%和20%

这个标志是何含义？（）

A．T型交叉路口

B．Y型交叉路口

C．十字交叉路口

D．环行交叉路口

某工程项目确定采用邀请招标的方式，监理单位在招标前经测算确定该工程标底为4000万元，定额工期为40个月，经研究、考察确定邀请4家具备承包该工程项目相应资质等级的施工企业参加投标。招标小组研究确定采用如下综合评分法评标的原则。

(1)评价的项目中各项评分的权重：报价占40%，工期占20%，施工组织设计占20%，企业信誉占10%，施工经验占10%。

(2)各单项评分时，满分均按100分计，计算分数值时取小数点后一位数。

(3)“报价”项的评分原则：以标底±5%(标底)值为合理报价，超过此范围则认为是不合理报价。计分是以标底标价为100分，标价每偏差-1%扣10分，偏差+1%扣15分。

(4)“工期”项的评分原则：以额定工期为准，提前15%为满分100分，依此每延后5%扣10分，超过额定工期者被淘汰。

(5)“企业信誉”项的评分原则：以企业近3年工程优良率为准，优良率100%为满分100分， 90%为90分，依此类推。

(6)“施工经验”项的评分原则：按企业近3年承建类似工程与全部承建工程项目的百分率计，100%为满分100分。

(7)“施工组织设计”由专家评分决定。

经审查，四家投标的施工企业的上述5项指标汇总见表6-3。

表6-3 指示汇总

[问题]

1．根据上述评分原则和各投标单位情况，对各投标单位的各评价项目推算出各项指标的应得分。

2．按综合评分法确定各投标单位的综合分数值。

3．优选出综合条件最好的投标单位作为中标单位。

被誉为“百戏之祖”的昆曲，抓住被列入首批“人类口述和非物质遗产代表作”这一历史契机，大胆创新，让古老的昆曲焕发出了崭新的魅力。青春版《牡丹亭》推出不到一年，品牌价值已达到1000万元，成为中国昆曲史上的一大奇迹。昆曲的这一变化说明（）

A.事物发展总是从量变开始

B.辩证的否定是事物联系的环节

C.创新推动人类思维与文化的发展

D.事物发展是前进性和曲折性的统一

Our ape-men forefathers had no obvious natural weapons in the struggle for (1) in the open. They had neither the powerful teeth nor the p claws of the big cats. They could not (2) with the bear, whose strength, speed and claws (3) an impressive " small fire" weaponry. They could not even defend themselves (4) running swiftly like the horses, zebras or small animals. If the ape-men had attempted to compete on those terms in the open, they would have been (5) to failure and extinction. But they were (6) with enormous concealed advantages of a kind not possessed by any of their competitors.

In the search (7) the pickings of the forest, the ape-men had (8) efficient stereoscopic vision and a sense of color that the animals of the grasslands did not (9) . The ability to see clearly at close range permitted the ape-men to study practical problems in a way that lay far (10) the reach of the original inhabitants of the grassland. Good long-distance sight was (11) another matter. Lack of long-distance vision had not been a problem for forest-dwelling apes and monkeys because the (12) the viewpoint, the greater the range of sight-so (13) they had had to do was climb a tree. Out in the open, however, this simple solution was not (14) . Climbing a hill would have helped, but in many places the ground was flat. The ape-men (15) the only possible solution. They reared up as high as possible on their hind limbs and began to walk (16) . This vital change of physical position brought about considerable disadvantages. It was extremely unstable and it meant that the already slow ape-men became (17) still. (18) , they persevered and their bone structure gradually became (19) to the new, unstable position that (20) them the name Homo erectus, upright man.

19（）

A.accustomed

B.familiarized

C.adapted

D.suited