根据《中国移动PON网络工程施工及验收规范》，英文缩写EPON意思是（）。 A.G比

牛海绵状脑病可传染给人类，引起人的新型克-雅氏症，其致病因子是（）

A.病毒

B.细菌

C.立克次氏体

D.真菌

E.具有生物活性的蛋白质

阅读材料，回答下列问题。

材料一：2010年我国GDP增长率及投资、消费、外需对GDP增长的贡献率如下表：

B  

There was a Roman general in the 3rd century BC named Regulus who always kept his word. This fact was well known even to Rome’s enemy—Cathage. Once, he lost a battle and was taken prisoner and sent to a Carthage prison for a period of time. Finally, his captors came to him with an offer, which they hoped would cause the Romans to give in, thus ending the war.

They asked General Regulus to go back to Rome. They wanted him to tell the Romans that Carthage was winning the war and it was useless for Rome to continue fighting. They also said that if he refused to do as they asked, he would have to sail back to Cathage and serve as a prisoner of war in their prison. Since General Regulus was a man of honor, they knew he would keep his word and return to Carthage.

Regulus set sail for Rome and on his arrival, he was immediately taken to the authorities (当局). He knew how the war was progressing from the enemy's point of view. He told the Romans that they should not give up but continue fighting, as it would only be a matter of time until Rome would win the battle over Carthage. So the Romans decided to continue the war effort. Large groups of soldiers were sent to battle due to General Regulus' suggestion.

Regulus went home to see his wife and his children but only for a short time. With deep sorrow, he informed them that he had given his word that he would return to Carthage and to his prison. Though they wished he would stay, his family knew that he must keep his word and return. He returned to Carthage as promised but Rome soon won the war.

60. This passage mainly tells us that General Regulus was____.

A. a determined man                             B. a man of his word

C. loyal to his homeland                          D. a patient man

61. The underlined word “captors" (in Paragraph 1) probably refers to “____”.    

A. people who are taken prisoners             B. people who have lost a battle

C. people who have won a battle              D. people who keep others prisoners

62. After General Regulus' visit to Rome, the Romans_____.

A. continued the war                             B. made peace with Carthage

C. gave in                                      D. accepted their failure

物料需求计划（MRP）是由企业制订的生产计划所确定的，而DRP则是由（）引导的，企业无法加以控制。

A.生产计划 

B.顾客需求 

C.物流 

D.流通加工

基因分离规律的实质是（）

A.子二代出现性状分离

B.子二代性状的分离比为3：1

C.测交后代性状的分离比为3：1

D.等位基因随同源染色体的分开而分离