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答案：
C
Arithmetic I
From the chart, the approximate numbers of shipments are as follows:
| Year | Number of Shipments |
| 1990 | 190,000 |
| 1991 | 180,000 |
| 1992 | 210,000 |
| 1993 | 270,000 |
| 1994 | 310,000 |
| 1995 | 350,000 |
| 1996 | 380,000 |
| 1997 | 370,000 |
| 1998 | 390,000 |
| 1999 | 360,000 |
| 2000 | 270,000 |
Since there are 11 entries in the table and 11 is an odd number, the median of the numbers of shipments is the 6th entry when the numbers of shipments are arranged in order from least to greatest. In order, from least to greatest, the first 6 entries are:
| Number of Shipments |
| 180,000 |
| 190,000 |
| 210,000 |
| 270,000 |
| 270,000 |
| 310,000 |
The 6th entry is 310,000.
The correct answer is C.
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