某国有6家快递公司在全国范围内提供快递服务。为研究该国快递市场竞争状况，现将全国划分为三个区域，按务收入计算了快递公司在各区域的市场分布状况。数据如下表所示。另已知区域Ⅰ、区域Ⅱ、区域Ⅲ的业务收入总额分别是1亿元、2亿元、2亿元。请根据已知数据回答下列问题。
根据全国与各区域快递市场CR4的比较，可知（）.
A．全国市场的集中度大于各区域市场的集中度
B．区域Ⅲ市场的集中度最高
C．区域Ⅰ市场的集中度低于全国市场的集中度
D．区域Ⅱ市场的集中度高于全国市场的集中度
参考答案：B, C
解析：
本题考查行业集中度。区域Ⅰ的行业集中度为CR4=86%。区域Ⅱ的行业集中度CR4=88%。区域Ⅲ行业集中度CR4=100%，从全国范围看，快递市场集中度CR4=23.4%+30.4%+18.2%+18.4%=90.4%。因此选项BC符合题意。
| 阅读理解。 |
| Peter is thirteen years old. He is in Grade Two this year. He likes to play football and watch football matches. And he often reads newspapers. He does his best to know when and where there is going to be a football match. Now Peter is having lunch. He is listening to the radio, too. He is very happy because there is going to be a nice football match on TV at four this afternoon. He wants to watch it very much. But he is going to have English and Chinese lessons. He thinks hard and finds a way. "Hello, Mrs Black," Peter says to his teacher on the telephone. "Peter is ill in bed. He wants to ask for half a day's leave (请半天假). "Oh, I'm sorry to hear that," says Mrs Black."But who is that?" "It's my father, Mrs Black." |
| 1. Peter is a ______. |
[ ] |
| A. middle school student B. Young Pioneer C. worker D. teacher |
| 2. Peter will be in ______ next year. |
[ ] |
| A. Grade Two B. Grade Three C. Grade One D. school |
| 3. Peter often reads newspapers because ______. |
[ ] |
| A. he likes to read news B. he likes to read stories C. he wants to know when and where a football match will be D. his father wants him to read them |
| 4. Peter wants to ask for half a day's leave because ______. |
[ ] |
| A. his father is ill in bed B. he wants to watch the football match C. he doesn't want to have English or Chinese lessons D. he is ill in bed |
| 5. Which of the following is right? |
[ ] |
| A. Mrs Black is going to take Peter to see a doctor. B. Peter likes to watch TV at five in the afternoon. C. Peter is a stupid (愚笨的) teacher. D. Peter is not an honest (诚实的) boy. |