1，4，27， ( )，3125。A．70 B．184 C．256 D．351

回答问题。阅读短文，然后根据短文内容简要回答下列问题。（计10分）

Some things can carry messages, for example, a sign at the bus stop helps you to know which bus to take. Signs on the door tell you where to go in or out. Have you ever noticed that there are a lot of signs around you and that you receive messages from them all the time?

People can communicate on many other ways. An artist can use his drawing to tell about beautiful mountains, about the blue sea and many other things. Books are written to tell you about all the wonderful things in the world and also about people and their ideas.

Books, magazines, TVs, radios and films all help us to communicate with others. They all help us to know what is going on in the world and what other people are thinking about.

1. What can help you if you want to know which bus to take?

_______________________________________________

2. What do the signs on the door do?

_______________________________________________

3. People can communicate in many other ways, can’t they?

_______________________________________________

4. What can help us to communicate with others?

_______________________________________________

5. What do they help us to do?

_______________________________________________

环境温度不低于（）℃，且不高于()℃的场所应采用湿式系统。

A、4；70

B、0；60

C、2；80

D、4；50

计算题：

甲公司计划投资某一项目，原始投资额为200万元，全部在建设起点一次投入，并于当年完工投产。投产后每年可增加销售收入90万元，增加付现成本21万元。该项固定资产预计使用10年，最终净残值10万元。税法规定按直线法提取折旧，折旧年限10年，预计净残值率为原值的5%。该公司拟按目前产权比率为2/5的目标结构来追加资金，预计负债的税前资本成本为10%，所得税税率为30%。公司过去没有投产过类似项目，但新项目与另一家上市公司的经营项目类似，该上市公司的β资产为0.525。目前证券市场的无风险收益率为5%，证券市场的平均收益率为19.06%。

要求：

(1)计算项目各年度经营现金净流量;

(2)计算新项目筹资的加权平均资本成本(百分数四舍五入保留整数);

(3)计算项目的净现值，并评价项目的可行性。

BT延长主要见于（）

A.血小板数量异常

B.血小板功能缺陷

C.血管性血友病

D.纤溶亢进症

E.DIC高凝期

酒精是一种常用的消毒剂