Answer:

Part 1 E-C:

1. 23,400,023,948

2. 349,713,295

3. 456,034,521,112

4. 54,623,432

5. 900,099,887

Paert 2 C-E:

1. 34'5121'3212

2. 668'8634

3. 540'0945

4. 4455'5554'3222

5. 6'0008'8814

Part 3 Passage interpreting

中国主要有七大水系,它们分别是长江流域、黄河流域、松花江流域等。这七大水系与河流的年流量总计达27120亿立方米，位居世界第六位。

China has 7 major river systems，the Yangtze River, the Yellow River, the Songhuajiang River, etc. The annual flow capacity of these rivers totals to 2, 712 billion cubic meters, which ranks the 6th in the world.

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