[单项选择]

1，25（OH）₂D₃的叙述不正确的是（）
 

A. 调节钙磷代谢，使血钙升高
B. 可看成是一种激素
C. 由维生素D₃经肝脏直接转化而成
D. 维生素D₃的活性形式
E. 作用的主要靶器官是骨和肾

        Do people who chose to go on deserve free health advice before they travel And even if they pay, who ensures that they get good, up-to-date information Who, for that matter, should collect that information in the first place For a variety of reasons, travel medicine in Britain is a responsibility nobody wants. As a result, many travelers go abroad ill prepared to avoid serious disease.
        Why is travel medicine so unsolved Partly there’s an identity problem. Because it takes an interest in anything that 侵犯） on the health of travelers, this emerging medical specialism invariably cuts across the traditional disciplines. It delves into everything from seasickness, jet lag and the hazards of camels to 瘴气）and plague（瘟疫）.But travel medicine has a more serious obstacle to overcome. Travel clinics are meant to tell people how to avoid ending up dead of in a tropical disease hospital when
A. is for the government to decide.
B. should be left to specialist hospitals.
C. can be left to travel companies.
D. has no clear and simple answer.

有以下程序
    #include   
    main(int argc,char  *argv[]) 
    {int  i=1,n=0；
    while(i     printf("％d＼n",n)；
    }  
    该程序生成的可执行文件为：proc.exe。若运行时输入命令行：
    proc  123  45  67  
    则程序的输出结果是（）。

1.25-（OH）₂D₃的生物活性以下叙述哪项不正确（）

一种溶液pH=10.8，溶液的c（OH^-）可能是（）。
 

      In sixteenth-century Italy and eighteenth-century France, waning prosperity and increasing social unrest led the ruling families to try to preserve their superiority by withdrawing from the lower and middle classes behind barriers of etiquette. In a prosperous community, on the other hand, polite society soon absorbs the newly rich, and in England there has never been any shortage of books on etiquette for teaching them the manners appropriate to their new way of life.
       Every code of etiquette has contained three elements: basic moral duties; practical rules which promote efficiency; and artificial, optional graces such as formal compliments to, say, women on their beauty or superiors on their generosity and importance.
       In the first category are consideration for the weak and respect for age. Among the ancient Egyptians the young always stood in the presence of
A. take in the recently wealthy.
B. retreat within themselves.
C. produce publications on manners.
D. change the laws of etiquette

God and My Father
       I thought of God as a strangely emotional being. He was powerful; he was forgiving yet obdurate, full of warmth and affection. Both his wrath and affection were fitful, they came and they went, and I couldn't count on either to continue: although they both always did．In short God was much such a being as my father himself.
       What was the relation between them, I wondered — these two puzzling deities
       My father's ideas of religion seemed straightforward and simple. He had noticed when he was a boy that there were buildings called churches; he had accepted them as a natural part of the surroundings in which he had been born. He would never have invented such things himself. Nevertheless they were here. As he grew up he regarded them as unquestioningly as he did banks. They were substantial old structures, they were resp
A. had been born in natural surroundings with banks and churches.
B. never really thought of God as having a real existence.
C. regarded religion as acceptable as long as it did not interfere.
D. regarded religion as a way that he could live a spiritual life.

Conflict And Competition
        The question of whether war is inevitable is one which has concerned many of the world’s great writers. Before considering the question, it will be useful to introduce some related concepts. Conflict, defined as opposition among social entities directed against one another, is distinguished from competition, defined as opposition among social entities independently striving for something which is in inadequate supply. Competitors may not be aware of one another, while the parties to a conflict are. Conflict and competition are both categories of opposition, which has been defined as a process by which social entities function in the disservice of one another. Opposition is thus contrasted with cooperation, the process by which social entities function in the service of one another. These definitions are necessary because it is important to emphasize that competition between individuals or groups is
A. War.
B. Conflict.
C. Competition.
D. Cooperation.

CCl₄难溶于水而C₂H₅OH易溶于水的原因不可能是（）。