沟通出现障碍的缘故原由主要有（）A、信息策划障碍 B、信息吸收障碍 C、信息理解

水分离和水分层

成年患者，输血100mL后，突然寒战、高热，恶心呕吐，头痛心悸，剧烈腰痛，血压下降等，可诊断为（）。

A.发热反应

B.过敏反应

C.细菌污染反应

D.溶血反应

E.循环超负荷

撇脂定价

The United States counts its population every ten years, and each census reveals that the racial and ethnic mix is changing dramatically, so by the year 2050, the "average" American will not be descended from (1) , but the majority of U. S. residents will trace (2) ancestry to Africa, Asia, the Hispanic world, the Pacific Islands, or the Middle East. Once the United States was a microcosm of European nationalities, (3) the United States is a microcosm of the world. The United States is (4) considered a "melting pot" society by many of its residents. (5) , many people prefer the term "salad bowl." They use this (6) to describe American society. American society will soon be (7) nonwhite. "Melting pot" implies that the different ethnic groups blend together (8) one homogeneous (9) , "salad bowl" (10) that nationalities, like the ingredients in a mixed green salad, retain their cultural (11) . Earlier generations of (12) believed they had to learn English quickly not only to survive but also for (13) .
Now, many immigrant groups do not (14) the same need. Because there are many places in America (15) you can work, shop, get medical care, marry, divorce and die without knowing English. (16) , Chinatown in San Francisco and New York. Also, Los Angeles has many Vietnamese immigrants and immigrants from Mexico. (17) , many immigrant groups want their children to know their (18) culture. Many Hispanics, for instance, want their children to learn (19) English and Spanish and study the Spanish language in school. They are fighting for the (20) to bilingual education in many communities. In many communities they are in the majority.

假如张先生在去年的今天以每股25元的价格购买了1000股招商银行股票，过去一年中得到每股0.20元的红利，年底时股票价格为每股30元，则其持有期收益率为( )。

A．20%
B．10%
C．20.8%
D．30%