Cumulative quantity can be calculated directly
                    举一反三
- The quantity of petroleum should be calculated by() A: capacity B: number C: weight D: length
 - 中国大学MOOC: Recombination frequencies can be calculated by
 - The content of nitrogen-free extracts in the feed can be directly determined.
 - With some______ , this method can be directly utilized by test organizations.
 - The VR is calculated in order that the aircraft can reach screen height at V2 with one engine failure.
 
