下列各项中哪些可以用比表面积法测定粒子的粒径A．泥悬剂 B．脂质体 C．散剂 D．乳

根据下列短文内容，在短文后的空格处填上一个恰当的词，使短文完整、通顺。

    Ten-year-old Barack Obama was one of only three black 1             at his school in Hawaii, USA. He felt

very 2              from most other students. White girls wanted to touch his hair. A white boy 3              

him if his father ate people."I lied to them that my father was a Kenyan (肯尼亚) prince (王子).

But I kept asking 4             who I am," said Obama. However, 37 years later, the boy made history.

Obama became the 5              black president (总统) in US history. Obama was 6            in 1961,

to an African father and a white American woman a small town in the USA. He grew 7             in

Indonesia and Hawaii. This unusual background made him wonder who he was. He once turned to

alcohol (酒精) to help forget this question. 8              the help of his friends, Obama finally turned his

life around at college. His hard work made him STAR Harvard (哈佛大学). Later, he became only the

third black senator (参议院) in US history. During his race to the highest post in the US, Obama talked

about this background. He called for a Untied States of America, rather than a white America or a

black America. Obama's success has made Martin Luther King's dream come 9             . That is:

A man should not be judged (判断) by the color of his skin, 10              by the content of his

character (性格). 

                                                                                                                          —From BBC news.

阅读以下材料，完成下题。

投资者甲拟购买公司乙发行的债券，该债券的面值为100元，票面利率为10%，期限为5年。甲要求的必要收益率为12%。请计算以下情况下的债券市场价格。

债券以单利贴现，每年末付息一次，到期还本（）元。

A.105.6

B.91.38

C.92.79

D.99.85

胆总管分4段，依次为（）

A.十二指肠上段一十二指肠后段一胰腺段一肠壁内段

B.十二指肠前段一十二指肠上段一胰腺段一肠壁内段

C.十二指肠上段一十二指肠下段一胰腺段一肠壁内段

D.十二指肠上段一十二指肠后段一肠壁内段一胰腺段

E.十二指肠前段一十二指肠后段一胰腺段一肠壁内段

十二经脉的络脉均是从____的络穴分出，走向____的经脉。

蒸汽进行表面膜态凝结时，提高凝结换热系数中不正确的方法是（）

A.增加凝结面积；

B.增加蒸汽流速；

C.减少其中不凝性气体含量；

D.机械除液。