The answer should be consistent with objective reality, major design should include all possible situations that may arise, the answer can be made between the radio with or overlap each other, the same set of answers can only be classified according to the same standard, the answer according to the

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The answer should conform to the situation which the objective reality, the major event design must contain as far as possible all possibly appears, only choose between the answer not to be able to contain mutually or to overlap, the identical group answer only can according to the identical standar

Continue the answer should be consistent with the objective reality, design should contain as much as possible between all possible situations, radio answers cannot include or overlap each other, the same set of answers only with a standard level of classification, type the answer to in turn order,

The answer should accord with the objective reality, the design of the major case should include all situations that may appear as much as possible, select only the answers can't include or overlap each other, the same group of answer can only be classified according to the same standard, the degree