某公司有两个投资项目，其现金流量见下表，该公司的资本成本为10%。要求： （1）分别

What is the relationship between violence and sports? Psychologists say that there are many reasons for violence at sports events. One is alcohol. Many fans drink a lot at games. When people drink, they are more likely to do abnormal things. Psychologist Dennis Brock says, “Quiet people become loud. Normally nonviolent people become destructive． ”

David Sampson, a sports sociologist, says, “These are often celebratory riots— a large number of very happy people mixed in with large amounts of alcohol. They don’t often seem dangerous in the beginning, but things get violent quickly． ”

Another reason for violence at sports events is the crowd. When individuals are in a large group of people, they can lose their sense of personal responsibility. Edward Hirt, a social Psychologist, says that research shows that people do things in crowds that they would never do alone. People in crowds feel anonymous — no one knows who they are. Crowds also make people feel powerful. They stop making personal decisions. They just follow the crowd. Social psychologists call this a “mob mentality．”

Dave Zarifis, head of public safety says, “Some people don’t even come to celebrate. They want to drink hard and make trouble. Someone does something stupid, and it grows from there. You get a mob mentality. People think it’s OK to do almost anything. They think, ‘There are so many of us and not enough of them． ’ ”

Social psychologist Dr. Sharon Kennedy says that there are some things officials can do to prevent violence. Making sure that an area is not overcrowded is very important. Officials should also think of games as “big parties．” Then they will prepare differently. Kennedy says that in Great Britain they are controlling the problem with cameras in all the stadiums. “When you know someone is watching, you are much less likely to behave badly． ”

小题1:Which of the following best gives the main idea of the first two paragraphs? 

A．There’s a connection between violence and sports

B．One cause of violence at sports events is alcohol．

C．There are many reasons for violence at sports events．

D．David Sampson and Dennis Brock have the same opinion．小题2:Which of the following does NOT belong to a “mob mentality”?

A．“I must drink some alcohol to stop myself feeling shy． ”

B．“ It’s safe to do what many people are doing． ”

C．“There are so many of us and not enough of them． ”

D．“ No one knows I’m doing this． ”小题3:How many experts are quoted by the writer of this passage?

A．Two．

B．Four．

C．Three．

D．Five．小题4:The last paragraph is mainly about ______．

A．how to turn games into big parties

B．why to install cameras in stadiums

C．how to prevent violence at sports events

D．how to avoid oneself behaving badly小题5:What lesson can we learn from this passage?

A．Never drink any alcohol no matter where you are．

B．Whenever you are watching a game, you should keep quiet．

C．Never follow blindly no matter how many people are doing something．

D．Be careful when you are at a stadium because there are cameras there．

引起婴儿视神经损害，智力障碍和惊厥的是（）.

A．四环素 

B．反应停 

C．氯霉素 

D．新生霉素 

E．磺胺

根据《企业会计准则第15号——建造合同》，工程成本中的其他直接费是指在施工过程中发生的（）。

A．生产工具用具使用费

B．冬雨季及夜间施工增加费

C．流动津贴

D．工程排污费

E．检验试验费

急性根尖周炎应急处理正确的是

A．在局麻下进行

B．开通髓腔，引流根管

C．穿通根尖孔

D．有脓肿时切开排脓

E．以上均是

9个月女孩，母乳喂养，面色蜡黄，表情呆滞，烦躁不安。肝肋下2cm，脾肋下1cm红细胞2.8×10¹²/L，血红蛋白70g/L，红细胞大小不等，大的红细胞内中央浅染区扩大，骨髓片呈巨幼细胞增生，其核粗松，胞质较少。

还须做下列哪项检查帮助诊断

A．血清铁蛋白、叶酸、维生素B₁₂含量测定

B．Coombs试验＋网织红细胞计数

C．骨髓糖原染色检查

D．血红蛋白电泳检查

E．红细胞寿命测定