Please select from the following choices the one that does not count as one of goals of SPSE writing（）
A. Interest your reader in the problem
B. Explain your solution clearly
Convince your reader that your solution is not necessarily better than other solutions
D. —
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is the main factor determining the stable infiltration rate of soil（）
A. Rainfall intensity
B. Soil water content at the beginning of rainfall
C. Rainfall duration
D. Soil characteristics
The characteristics of convective rainfall are（）
A. large rainfall intensity , large rain area and long rainfall duration
B. small rainfall intensity, small,rain area and short rainfall duration
C. large rainfall intensity, small rain area and short rainfall duration
D. small rainfall intensity, large rain area and long rainfall duration
There are also some key linguistic concepts commonly used in SPSE writing. Please select from the following choices the one that is not used to discuss the extent of the problem（）
A. The problem is quite serious because …
B. As far as I can see, the main problem is …
C. If the problem is not dealt with …
D. —
The occurrence and development of hydrological phenomena are accidental, therefore, their occurrence and changes（）
A. is disorganized
B. has statistical pattern
C. is with complete certainty pattern
D. has no pattern
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