新录用公务员在机关最低服务年限为（）年（含试用期）。 A.一年 B.三年 C.五年

计算题：

某企业为免税企业，计划进行某项投资活动，有甲、乙两个备选的互斥投资方案资料如下:

(1)甲方案原始投资150万，其中固定资产投资100万，营运资本投资50万，全部资金于建设起点一次投入，初始期为0，经营期为5年，到期净残值收入5万，预计投产后年营业收入(不含增值税，下同)90万，不包含财务费用年总成本费用60万元。

(2)乙方案原始投资额200万，其中固定资产投资120万，营运资本投资80万。初始期2年，经营期为5年，资本化利息10万，固定资产投资于初始期起点投入，营运资本投资于初始期结束时投入，固定资产净残值收入8万，项目投产后，年营业收入170万，年付现成本80万，运营期每年归还利息5万。固定资产按直线法折旧，全部流动资金于终结点收回。

要求:

(1)计算甲、乙方案各年的净现金流量

(2)计算甲、乙方案包括初始期的静态回期

(3)该企业所在行业的基准折现率为10%，计算甲、乙方案的净现值

(4)计算甲、乙两方案净现值的等额年金，并比较两方案的优劣

(5)利用共同年限法比较两方案的优劣。

诺贝尔经济学奖的得主萨金特和西姆斯通过对“利率上调是如何影响GDP的？如果政府调整财政预算，经济将会怎样？”等经济问题的分析，创立了一系列方法，用于研究经济政策与宏观经济之间的关系。从哲学角度看，经济学家的研究成果

A．提供了认识世界的根本方法

B．源于经济学家对经济活动的观察和思考

C．构建了主观见之于客观的桥梁

D．是对自然知识的概括总结

雌、孕激素对下丘脑下部及脑垂体前叶的反馈是（）

A.雌激素-正负反馈，孕激素-负反馈

B.雌激素-负反馈，孕激素-正负反馈

C.雌激素-正反馈，孕激素-负反馈

D.雌激素-负反馈，孕激素-正反馈

E.雌激素-负反馈，孕激素-负反馈

LOS ANGELES--- Two lost hikers who survived three nights in mountains thanks to supplies at a campsite of another hiker who disappeared last year described their suffering, saying they had “the real special thank” for the man who is probably dead.

The couple, Allen, 24, and Brandon Day, 28, were in Southern California for an important conference. They got lost on Saturday west of Palm Springs after wandering off a trail during what was supposed to be a day hike.

Prepared only for a brief hike, they wore light jackets and tennis shoes and had no food, spare clothing or mobile phone. With night closing in, they took shelter in a small cave and spent the night sleepless, freezing and hungry.

On Monday, they discovered a campsite in a dead valley. There was a sleeping mat, a backpack, a disposable razor(一次性剃刀), a spoon and tennis shoes. Day and Allen were delighted, thinking someone there could help them find the way out. But later they realized the place was deserted.

They found identification showing the camper was Donovan, 60, a retired social worker from Virginia. They learned later in his diary that he was an experienced hiker and he disappeared on May 2, 2005, in icy weather.

They found articles in his backpack: a warm sweater for Allen, dry socks for Day and matches. They lit a small signal fire to attract a helicopter crew in the distance, but the crew did not see them.

On Tuesday morning, Day created “a really big smoke signal” that finally attracted a helicopter crew. They were examined at a hospital and had only bruises(擦伤).

“We feel great. We’re thankful. We feel like we’ve been given a second chance,” said Day, who expressed that they wouldn’t give up hiking even after this experience.

1. The passage most probably appears in ________.

A. an advertisement             B. a newspaper    C. a travel guidebook        D. a travel journal

2. Why did Allen and Day go to Southern California?

A. To go for a short hiking in mountains.    B. To search for the hiker missing a year ago.

C. To attend an important conference.      D. To enjoy the scenery of Palm Springs.

3. Which of the things the couple found helped them the most?

A. Tennis shoes.      B. A sleeping mat.        C. a warm sweater.     D. Matches.

4. Which of the following statements is TURE?

A. The couple realized the campsite was deserted the moment they found it.

B. The couple at first thought the person in the camp could help them out.

C. It was the icy weather that led to Donovan’s disappearance and death.

D. This experience would prevent the couple hiking again in future.

负荷联轴器间采用正压通风系统，透平间采用（），#2轴承区域采用（）。