随着经济布局调整，世界电力格局将发生哪些重大变化？（） A.世界各大洲的年人均电力需

我能把下面的句子组成一句通顺的话，并加上标点。     

1．植物妈妈  可  的  真多呀  办法

      ___________________________________________

2．美丽的  山野  图画  就是 

      ___________________________________________

3．使  秋天  谁  美丽  这样

      ____________________________________________

任何一组不对称的三相正弦交流电压或电流向量都可分解为（）三组对称分量。

A、正序

B、负序

C、零序

D、相序

Have you ever seen any students whose trousers hang so low that you can see their underwear? What do you think of that? Fashionable? Some of today’s teenagers are big fans of such a look. But recently this trend has been at the center of an argument in Italian middle schools. The headmaster of a school in central Italy has asked students to stop wearing low-rise jeans that expose underwear and parts of the body. His request came after a class trip, when he saw one boy's baggy trousers slide to his feet. He pointed out that this way of dressing is not suitable for school. But in Italy, a nation that takes fashion very seriously, the suggestion caused a debate among parents, teachers and students. The issue is whether the headmaster's request will limit students' freedom— or whether dress in Italian schools is too casual. A parents' group praised the move in favor of good taste, while others advised schools to stop worrying about fashion and fix up old school buildings. “We do not want to kick fashion out,” the headmaster explained, “but extremes of fashion like this are not right in school.” Many other schools have now requested that their students also stop wearing such trousers. Most students have simply ignored the request. Ludovica Gaudio, 14, wore extremely low trousers exposing orange underwear in class. It was cold, so she wore a matching orange scarf. Another 14-year-old said she would probably respect the request, simply for practical reasons. “I don't really feel comfortable in those sort of jeans，” said Sarah Lattanzi, “in winter, when dressed like that, it's quite cold and I am afraid my stomach will ache.”

小题1:What led to the argument in Italian middle schools？______

A．Students' craze for fashions.

B．Clothes that are too exposing.

C．Students' ignoring dress codes.（规则）

D．Students' underwear.小题2:Which of the following supports the headmaster's request?___

A．Fashion should be taken seriously.

B．Fashion should not be followed in school.

C．Students should have their freedom in choosing what they wear.

D．Students should be encouraged to have good taste in clothes.小题3: The argument against the headmaster's request is that ______.

A．dress in Italian schools is too casual

B．fashion should not be followed in school

C．schools should pay attention to things more important than students' clothes

D．low-rise jeans can do harm to youngster's health小题4:The purpose of this story is to ________

A．show Chinese students that wearing very fashionable clothes in school is under attack in other countries, too.

B．show that dress code is necessary even in a country like Italy

C．let us see that Italian students react differently to schools' requests.

D．tell us that a debate started in Italian middle schools over the way students dress in School

发生霍乱时，对疫区内接触者，规定的隔离观察时间是（）

A.3天

B.5天

C.7天

D.10天

E.14天

大华公司目前从事等离子电视的生产和销售，正在考虑引进流水线生产冰箱的投资项目，通过调查研究提出以下方案，有关资料如下：
(1)市场调研费：为了了解冰箱市场的销售情况以及市场潜力，公司为此发生的市场调研费用为30万元。
(2)厂房：如引进流水线会利用公司现有的两处房产：①甲房产：原价5000万元，截止2010年8月31日已提累计折旧3600万元，可变现价值为1220万元，预计变现会发生10万元的清理费用，尚可使用6年，税法规定的净残值率为原值的1%，预计使用期满净残值收入为26万元。②乙房产：原价2000万元，截止2010年8月31日已提累计折旧600万元，可变现净值为980万元，尚可使用8年，税法规定的净残值率为原值的1%，预计使用期满净残值收入为26万元。由于该房产位于公司的中心地带，因此公司规定为了不影响公司其他业务的正常进行，不允许出售。税法规定房产使用直线法提折旧，假设尚可使用年限正好符合税法规定。
(3)设备投资：设备购买总价2600万元，预计可使用6年，预计残值收入为8万元，该企业计划使用直线法提折旧；税法规定的残值收入为6万元，税法要求该设备折旧年限为5年，使用直线法提折旧。计划在2010年8月31日购进并支付价款。
(4)收入和成本预计：预计每年营业收入为4000万元，每年付现经营成本为1500万元。
(5)经营营运资本：预计2010年9月1日由于投资该项目而增加的经营流动资产和经营流动负债分别为170万元和80万元。
(6)设定该项目的目标资本结构为债务资本占70%，未来的资本结构和个别资本成本均保持不变。该项目的债务资本通过发行公司债券来筹集，每张债券的面值为1000元，发行价格为每张1020元，票面年利率为6%，期限8年，每年付息一次，到期还本，发行费用占发行价格的比率为2%。
(7)目前冰箱行业有一家非常具有代表性的A公司，A公司股票的β系数为1.8，其债务资本比例(债务资本/总资本)为60%，适用的所得税税率为25%，A公司可以保持目标资本结构不变。
(8)无风险收益率为3%，市场组合的平均收益率为7.894%。
(9)假设项目完工后预计的使用年限为6年，该公司适用的所得税税率为25%。
要求：用净现值法评价该企业是否应该投资此项目。