题目内容
调查显示，在既定月份，18～65岁的所有妇女有52%属于劳动力群体(在家庭以外被雇用)。根据这些调查，一位市场调研人员得出结论认为，18～65岁的所有妇女中 48%的人一年到头都是全职的家务劳动者。 下面哪项，如果正确，会最严重地削弱这位调研人员的结论
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过去。大多数航空公司都尽量减轻飞机的重量，从而达到节省燃油的目的。那时最安全的飞机座椅是非常重的，因此只安装很少的这类座椅。今年，最安全的座椅卖得最好。这非常明显地证明，现在的航空公司在安全和省油这两方面更倾向重视安全了。 以下哪项，如果为真，能够最有力地削弱上述结论
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Some people have dogs or cats as pets. One woman in New York keeps a monkey as her pet. This monkey can wash dishes. He washes the dishes for the woman every day. He likes to wash dishes and never breaks a dish. Sometimes he washes the same dishes over and over. If the woman tries to stop him, he then gets angry. He begins to throw the dishes in all directions. But this does not happen very often. The woman’s husband is very happy with the monkey. The husband never needs to help his wife wash the dishes. The monkey does all this work. The husband says that he cannot understand how anybody, a person or a monkey, can like to wash dishes so much. Some animals can be kept as pets.
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