A.Only a small number of colleges are involved in their survey.
B.Only a small range of universities are surveyed in their research.
C.They have adopted a method that is too strict and critical.
D.They have drawn conclusions that are not very convincing.
第5题
A.阎恒元、李有才、阎家祥、老秦、小元
B.小保、阎家祥、老秦、阎喜富、脚卵
C.阎恒元、张得贵、阎喜富、小明、菊儿
D.刘广聚、陈四、小保、老秦、小福
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