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问题 多项选择题

下面关于RACV5概念的描述正确的有：（）

A、逻辑通信通路（逻辑C通路）：一个或多个具有不同类型C路径的组合（也包括用于保护协议的C路径）。

B、每一个由1个2048Kbit/s链路以上构成的V5.2接口应具有保护组1；

C、V5中通道、通路、路径的概念是相同的，只是叫法不同；

D、链路的概念是指2M，而不是一个64K的时隙；

答案

参考答案：B, D

填空题


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.
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单项选择题

分项工程质量验收应由( )组织。

A．总监理工程师

B．监理工程师

C．业主专业技术负责人

D．B+C
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