速殖子、包囊、裂殖体、配子体和卵囊属于（）的5个形态阶段。A.蛔虫 B.肝吸虫 C.

Congress makes the laws in the United States. It has two pans, which are more or less equal in power. They are known as the House of Representatives and the Senate. The House of Representatives is larger than the Senate whose 100 members (two from each state) serve for six years. The 435 members of the House are elected every two years, and the number from each state is determined by the population of the state. For example, California, which has a large population, has 43 representatives, while the State of Nevada has only one.

The House and Senate are divided into small groups which take care of special matters such as education or foreign affairs. The most important work of Congress is often done in these groups, which are called subcommittees.

According to the Constitution of the United States, a senator must be at least 30 years old and he must have been a citizen of the United States for nine years at the time of his election. To be elected to the House a person must be 25 years old and must have been a United States citizen for seven years. At the present time, members of Congress include businessmen, farmers, teachers, and especially lawyers. In general, senators are better known than representatives because they are fewer in number and serve for a longer time. Many American presidents served in Congress before they became president.

Which of the following is true().

A. A representative serves for two years.

B. To become a senator is easier than to become a representative.

C. A senator performs his duties for a shorter time than a representative.

D. All presidents were representatives and then senators before becoming president of the United States.

甲企业2008年发生如下经济业务： (1)企业购入一台需要安装的设备，价款为20000元，增值税为3400元，支付运费500元，保险费150元，安装费2000元。款项以银行存款支付。 (2)自行建造厂房一栋，领用工程物资100000元，在建工程人员工资50000元，厂房已经达到了预定可使用状态状态。 (3)投资者投入汽车一辆，双方确认的价值为250000元。 (4)接受某企业捐赠设备一台，根据有关发票确定其入账价值为20000元。 (5)计提本月固定资产折旧：基本生产车间5000元，行政管理部门2000元，专设销售机构3000元。 (6)报废设备一台，设备原值为50000元，已计提折旧40000元。清理中以银行存款支付清理费用200元，残值收入为3000元．款项存入银行。 (7)投资转出固定资产一台，原值为30000元，已经计提折旧10000元，发生相关税费2000元，投资双方对该固定资产确认的公允价为22000元。 (8)对一台旧的生产线进行改良，耗用工程物资2000元，工程人员工资3000元，通过改良，使生产线的性能得到了很大的提高。 (9)因为发生火灾，导致一台设备损坏，设备的原值为20000元，已经计提折旧10000元，保险公司应赔偿5000元。 (10)盘亏设备一台，原值20000元，已经计提折旧5000元，经查明属于保管人员管理不善导致，应由保管员赔偿500元。 要求：根据上述给定资料(1)—(10)编制甲企业的会计分录。

某企业拟投资一个项目，估算总投资12500万元，预计年销售收入6500万元，税后财务内部收益率(IRR)为11.59%。该项目存在两个主要风险变量，即产品销售价格和关键原料价格，可能与预期有所不同。产品销售价格估计值为3600元/t，该关键原料价格估计值为450元/kg。产品销售价格可能出现三种情况：有50%的可能为原估计值3600元/t，有30%的可能为3100元/t，有 20%的可能为2600元/t;该关键原料的价格可能出现两种情况：有70%的可能为原估计值450元/ kg，有30%的可能为500元/kg。各种可能出现的情况以及对应的IRR见表5-4。
表5-4产中销售价格与原材料价格不同情况下对应的IRR表

状态	产品销售价格/(元/t)	原料价格/(元/kg)	IRR(%)
1	3600	450	11.59
2	3600	500	11.23
3	3100	450	8.56
4	3100	500	8.17
5	2600	450	5.19
6	2600	500	4.75

问题：画出概率树。
2．运用概率树，计算IRR的期望值。

按冲程分，柴油机可分为二冲程和（）柴油机。

KG235C型烟片复烤机干燥四区温度一般为（）度。

A、50——70

B、70——80

C、60——70

D、70——90