1 Argument Example 调查 1, Selective sample:样本选择,一部分被排除在外 One major problem is about the sample the author studied in the survey
the author considers only
(selective sub-groups) although (the sub-groups the author studied) do constitute a significant part of (the whole general population), however, (many other sub-groups) are actually excluded from the survey
Perhaps
without ruling out all the possibilities above, the author could not make any general conclusion about
merely based on (selective sub-groups)
4,14,16,45,63,65,67,80,84,88,90,97,123,146,154,156,168,179,185,193,196,207,227,231,232,236,238,239 2, Quantity of the sample 样本数量 ( pointing out that the current sample is too small in its size)(the fact cited by the author) could hardly illustrate the assumption that