A．variationB．varietyC．varianceD．variable

【C8】A．numberB．varietyC．sumD．series

【33】A．rulerB．parameterC．scaleD．variable

【28】A．variationB．balanceC．frequencyD．stability

【C18】A．varianceB．varietyC．variationD．variable

【C8】A．possibilityB．capabilityC．abilityD．variability

【C7】A．variationB．varietyC．exchangeD．shift