早在秦汉时，（）就已成为全国著名的商业活动中心。 A.徐闻 B.合浦 C.广信 D.

哪项不是CR摄像的优点（）

A.实现常规X线摄影信息数字化

B.提高图像密度分辨力

C.辐射剂量降低

D.多信息显示

E.时间分辨力好

RAEB为骨髓增生异常综合征的（）。

A.慢性粒-单核细胞白血病

B.环形铁粒幼细胞难治性贫血

C.转化中的原始细胞过多难治性贫血

D.原始细胞过多难治性贫血

E.难治性贫血

Given Australia’s size and the fact that early settlements were far apart, Australian society is remarkably homogeneous (同种的). Its citizens are fundamentally prosperous（繁荣的） and the way of life in the major cities and towns is much the same however many miles divide them. It takes a sharp ear to identify regional accents.

However, there is some difference in lifestyle between city dwellers and the country people. Almost 90 per cent of the population lives in the fast-paced cities along the coast and has little more than a passing familiarity with the desert. The major cities preserve pockets of colonial heritage, but the overall impression is modern, with new buildings reflecting the country’s youth. In contrast, the rural communities tend to be slow-moving and conservative. For many years, Australia was said to have “ridden on the sheep’s back”, a reference to wool being the country’s main money-earner. However, the wool industry is no longer dominant. Much of Australia’s relatively sound economy is now achieved from natural coal and wheat, and by being the largest diamond producer in the world. Newer industries such as tourism and wine making are also increasingly important. Australians are generally friendly and relaxed, with a self-deprecating sense of humor. On the whole, Australia is a society without hierarchies (等级制度), an attitude generally held to stem from its prisoner beginnings.

Yet, contrary to widespread belief, very few Australians have true prisoner origins. Within only one generation of the arrival of the First Fleet in 1788, Australia had become a nation of immigrants. Originally coming almost entirely from the British Isles, today one in three Australians comes from elsewhere. Australia’s liberal postwar immigration policies led to an influx of survivors from war-torn Europe, most notably Greeks, Italians, Poles and Germans.

The emphasis has shifted in recent years and today the majority of new immigrants are from Southeast Asia. Today Australia is a ‘blend of nations’ and although some racism exists, it has generally been a successful experiment and the country is justifiably proud to have one of the most harmonious multicultural communities in the world.

51. What does the writer mean by saying “It takes a sharp ear to identify regional accents.” in the first paragraph?

A. Australians speak Standard English with no local accents whatsoever.

B. You have to practice a lot to learn to understand the different accents.

C. The Australian regional accents are very difficult to understand indeed.

D. There is not much difference between the accents in different areas of Australia.

52. Which of the following statements is TRUE according to the passage?

A. Most Australians have ancestors who were prisoners.

B. The Australian economy is dependent on sheep exports.

C. The majority of people living in Australia come from Europe.

D. The pace of life is different in the city and in the country.

53. The underlined pronoun ‘it’ in the final paragraph refers to “_______”.

A. community    B. racism    C. blend of Nations   D. Southeast Asia

54. We can infer from the passage that _____.

A. there are no signs of Australia’s colonial past in its modern cities

B. Australia’s recent immigration policy encourages immigrants from Southeast Asia

C. immigrants from Southeast Asia have brought racial problems

D. “riding on sheep’s back” resulted in slow development in rural communities

55. This passage mainly focuses on Australia’s ______.

A. society       B. economy     C. racial problems     D. history

关于环境背景值的说法，下列各项正确的是( )。

A．环境背景值反映的是环境质量的变化状态，是一个相对的概念
B．环境背景值反映的是环境质量的原始状态，是一个绝对的概念
C．环境背景值是一项活动开始前相对清洁区域的环境质量的平均值
D．环境背景值是一项活动开始前相对清洁区域的环境质量的最高值

中国沈阳国际贸易集团公司与中国台湾越秀公司以FOB高雄USD 50元/台的价格签订了进 10000台简易型节气门传感器(属自动进口许可管理、法定商检商品)的合同。该批货物于2007年5月10日由“青莲号”货轮载运进境。该公司于当日向海关申报货物进口，海关验放后，收货人发现其中有500台损坏，经该公司与香港公司交涉，越秀公司同意另外免费补偿同数量、同品牌、同规格的货物。补偿货物于2007年5月18日运达。
根据上述材料，回答下列问题：

下列关于该批损坏货物及其免费补偿货物进口税费的说法错误的是( )。

A．无论收货人对该批损坏货物作何处理，免费补偿货物均可免税进口

B．如收货人将该批损坏货物在内地作削价处理，经海关以对其残留价值补税，则补税货物可以免税进口

C．如收货人将该批货物放弃交由海关处理，则不得再向海关申请退还原征税款，但补偿货物可以免税进口

D．如收货人将该批损坏货物退运出境，并已向海关申请退还原征税款，则补偿货物进口时应照单征税