特发性血小板减少性紫癜的首选治疗为A．抗纤溶药物 B．免疫抑制剂 C．糖皮质激素 D

食品卫生与身体健康密切相关，下列做法对人体有害的是(    )

①香肠中添加过量的亚硝酸钠

②奶粉中添加三聚氰胺

③白酒中掺入工业酒精

④食品原料中添加“苏丹红一号”

A．①③④

B．①②③

C．②③④

D．①②③④

阅读理解。

    It was June 15, and in two days I would be turning thirty. I was insecure about

entering a new decade of my life and feared that my best years were now behind me.

    My daily routine included going to the gym for a workout before going to work. Every

morning I would see my friend Nicholas at the gym. He was seventy-nine years old and in

terrific shape. As I greeted Nicholas on this particular day, he noticed I wasn't full

of my usual vitality and asked if there was anything wrong. I told him I was feeling

anxious about turning thirty. I wondered how I would look back on my life once I reached

Nicholas's age, so I asked him, "What was the best time of your life?"

    Without hesitation, Nicholas replied, Well, Joe, this is my philosophical answer to

your philosophical question:

    "When I was a child in Austria and everything was taken care of for me and I was

nurtured by my parents, that was the best time of my life."

    "When I was going to school and learning the things I know today, that was the best

time of my life."

    "When I got my first job and had responsibilities and got paid for my efforts, which

was the best time of my life."

    "When I met my wife and fell in love, which was the best time of my life."

    "The Second World War came, and my wife and I had to flee Austria to save our lives.

When we were together and safe on a ship bound for North America, which was the best time

of my life."

    "When we came to Canada and started a family, which was the best time of my life."

    "When I was a young father, watching my children grow up, that was the best time of

my life."

    "And now, Joe, I am seventy-nine years old. I have my health, I feel good and I am

in love with my wife just as I was when we first met. This is the best time of my life."

1. When Joe's 30th birthday is drawing near, he feels _____. [ ]

A. excited

B. frightened

C. worried

D. eager

2. Joe usually goes to the gym to _____. [ ]

A. take exercise

B. begin his work

C. see his friend Nicholas

D. do his part -time job

3. What does the underlined word vitality in the second paragraph mean? [ ]

A. strength

B. Power to survive

C. Happiness

D. Energy and enthusiasm

4. What is the right order of the following events?

   a. Fell in love 

   b. Grew up in Austria

   c. Settled in Canada

   d. Escape from his country

   e. Got salaries [ ]

A. b a e d c

B. b e a d c

C. a b e d c

D. b c a d e

5. The purpose of the passage is to _____. [ ]

A. tell the reader about Joe's experience

B. tell the story of his friend Nicholas

C. tell people not to worry about their ages

D. tell people to take an optimistic attitude toward life

旋转式直流弧焊机由于空载损耗大和噪声大，所以正在逐步被弧焊整流器所代替。( )

治疗特发性血小板减少性紫癜常与肾上腺皮质激素合用促进疗效的药物是（）

A.小剂量丙球蛋白

B.大剂量丙球蛋白

C.小剂量白蛋白

D.大剂量白蛋白

E.α-干扰素

阅读下列材料，回答问题：

材料一从金人入主中原到元人统一全国，异族的音乐大量流入，汉族地区原有的音乐便与这种外来音乐相结合，产生新变，同时产生了与之相适应的新的歌词，这就是所谓“北曲”，也就是后来所说的“元曲”。其后，这种曲子一面用于杂剧，成为剧中的唱词，一面作为独立的抒情乐歌，也就是“散曲”。

——引自《中国戏剧发展简史》

材料二元蒙统治者废除科举制度，不仅断绝了知识分子跻身仕途的可能，而且把他们贬到低下的地位。这些修养颇高的文化人，被沉入社会底层。在疏远经史，冷淡诗文的无可奈何之中，他们只有到勾栏瓦舍去打发光阴、去寻求生路。于是，新兴的元杂剧意外地获得一批又一批的专业创作者。这些落魄文人共同创造着中国戏剧的黄金时代。与从前的偏于抒发主观心绪意趣的诗词不同，元杂剧以广泛反映社会为已任。显然，这是由于作家们长期生活于闾巷村坊，对现实有着深切了解和感受的缘故。

——引自《中国戏剧发展简史》

材料三元统一全国后，由于南方城市经济的固有优势，北方杂剧作家纷纷漫游或迁居南方，南方籍文人也纷纷染指杂剧创作。大致到大德末年以后，杂剧创作活动的中心逐渐由大都转移到杭州。

——引自《中国戏剧发展简史》

材料四元杂剧在城市经济发达的南方未能获得更大的发展，有多方面的原因。首先，杂剧虽然在元统一以后成为全国性的文艺样式，但它毕竟原产于北方，和北方的方言、音乐、民俗文化有密切的联系。杂剧创作的中心转移到南方以后，对它的继续生长必然有所不利。虽说杂剧作为主要戏曲种类的地位一直延续到明代前期，但它最后还是被从南戏发展起来的传奇所取代，这和地方文化的背景显然有很大的关系。

——引自《中国戏剧发展简史》

根据材料一，概括“散曲”产生的原因有哪些？（不得抄原文）